/usr/bin/java -Xmx8000000000 -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/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:07:13,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:07:13,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:07:13,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:07:13,847 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 [2021-07-13 20:07:13,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:07:13,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:07:13,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:07:13,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:07:13,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:07:13,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:07:13,863 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:07:13,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:07:13,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:07:13,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:07:13,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:07:13,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:07:13,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:07:13,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:07:13,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:07:13,864 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:07:13,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:07:13,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:07:13,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:07:13,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:07:13,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:07:13,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:07:13,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:07:13,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:07:13,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:07:13,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:07:13,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:07:13,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:07:13,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:07:13,865 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:07:13,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:07:13,865 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:07:14,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:07:14,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:07:14,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:07:14,113 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:07:14,114 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:07:14,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl [2021-07-13 20:07:14,115 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2021-07-13 20:07:14,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:07:14,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:07:14,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:07:14,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:07:14,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:07:14,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/1) ... [2021-07-13 20:07:14,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/1) ... [2021-07-13 20:07:14,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:07:14,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:07:14,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:07:14,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:07:14,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/1) ... [2021-07-13 20:07:14,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/1) ... [2021-07-13 20:07:14,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/1) ... [2021-07-13 20:07:14,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/1) ... [2021-07-13 20:07:14,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/1) ... [2021-07-13 20:07:14,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/1) ... [2021-07-13 20:07:14,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/1) ... [2021-07-13 20:07:14,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:07:14,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:07:14,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:07:14,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:07:14,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (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 [2021-07-13 20:07:14,257 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:07:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:07:14,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:07:14,257 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:07:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:07:14,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:07:14,258 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:07:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:07:14,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:07:14,258 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:07:14,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:07:14,403 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 20:07:14,404 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 20:07:14,405 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:07:14 BoogieIcfgContainer [2021-07-13 20:07:14,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:07:14,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:07:14,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:07:14,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:07:14,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:07:14" (1/2) ... [2021-07-13 20:07:14,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14acfc82 and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:07:14, skipping insertion in model container [2021-07-13 20:07:14,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:07:14" (2/2) ... [2021-07-13 20:07:14,415 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2021-07-13 20:07:14,418 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:07:14,419 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:07:14,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:07:14,419 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:07:14,445 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:07:14,460 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:07:14,473 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:07:14,473 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:07:14,473 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:07:14,473 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:07:14,473 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:07:14,473 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:07:14,473 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:07:14,473 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:07:14,480 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2021-07-13 20:07:14,488 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 20:07:14,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:14,494 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:14,495 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1070659179, now seen corresponding path program 1 times [2021-07-13 20:07:14,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:14,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075925123] [2021-07-13 20:07:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:14,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:14,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075925123] [2021-07-13 20:07:14,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075925123] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:07:14,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:07:14,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:07:14,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277520851] [2021-07-13 20:07:14,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:07:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:14,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:07:14,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:07:14,626 INFO L87 Difference]: Start difference. First operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 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 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:14,661 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2021-07-13 20:07:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:07:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 20:07:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:14,668 INFO L225 Difference]: With dead ends: 42 [2021-07-13 20:07:14,668 INFO L226 Difference]: Without dead ends: 30 [2021-07-13 20:07:14,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:07:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-07-13 20:07:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-07-13 20:07:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-07-13 20:07:14,691 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2021-07-13 20:07:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:14,691 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-07-13 20:07:14,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-07-13 20:07:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 20:07:14,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:14,692 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:14,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:07:14,692 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:14,693 INFO L82 PathProgramCache]: Analyzing trace with hash -616411682, now seen corresponding path program 1 times [2021-07-13 20:07:14,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:14,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238892273] [2021-07-13 20:07:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:14,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238892273] [2021-07-13 20:07:14,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238892273] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:07:14,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:07:14,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:07:14,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412145700] [2021-07-13 20:07:14,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:07:14,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:14,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:07:14,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:07:14,734 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:14,754 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2021-07-13 20:07:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:07:14,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 20:07:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:14,756 INFO L225 Difference]: With dead ends: 32 [2021-07-13 20:07:14,756 INFO L226 Difference]: Without dead ends: 31 [2021-07-13 20:07:14,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:07:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-07-13 20:07:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-07-13 20:07:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2021-07-13 20:07:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2021-07-13 20:07:14,761 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2021-07-13 20:07:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:14,761 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2021-07-13 20:07:14,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2021-07-13 20:07:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:07:14,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:14,762 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:14,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:07:14,763 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:14,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1444335643, now seen corresponding path program 1 times [2021-07-13 20:07:14,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:14,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653853204] [2021-07-13 20:07:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:14,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:14,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653853204] [2021-07-13 20:07:14,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653853204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:14,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507598133] [2021-07-13 20:07:14,870 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 [2021-07-13 20:07:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:14,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:07:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:15,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:07:15,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:15,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-07-13 20:07:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:15,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507598133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:15,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:15,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:07:15,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325333434] [2021-07-13 20:07:15,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:07:15,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:07:15,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:07:15,144 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:15,173 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-07-13 20:07:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:07:15,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 20:07:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:15,174 INFO L225 Difference]: With dead ends: 52 [2021-07-13 20:07:15,174 INFO L226 Difference]: Without dead ends: 41 [2021-07-13 20:07:15,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:07:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-13 20:07:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-07-13 20:07:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-07-13 20:07:15,178 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-07-13 20:07:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:15,178 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-07-13 20:07:15,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-07-13 20:07:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:07:15,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:15,179 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:15,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:07:15,393 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:15,396 INFO L82 PathProgramCache]: Analyzing trace with hash -559632325, now seen corresponding path program 1 times [2021-07-13 20:07:15,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:15,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332703931] [2021-07-13 20:07:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:15,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:15,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332703931] [2021-07-13 20:07:15,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332703931] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:07:15,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:07:15,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:07:15,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486832649] [2021-07-13 20:07:15,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:07:15,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:15,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:07:15,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:07:15,409 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:15,414 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-07-13 20:07:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:07:15,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 20:07:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:15,415 INFO L225 Difference]: With dead ends: 40 [2021-07-13 20:07:15,415 INFO L226 Difference]: Without dead ends: 40 [2021-07-13 20:07:15,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:07:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-07-13 20:07:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-07-13 20:07:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2021-07-13 20:07:15,418 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2021-07-13 20:07:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:15,418 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2021-07-13 20:07:15,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-07-13 20:07:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:07:15,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:15,419 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:15,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:07:15,419 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1654899146, now seen corresponding path program 2 times [2021-07-13 20:07:15,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:15,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380574335] [2021-07-13 20:07:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:15,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:15,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380574335] [2021-07-13 20:07:15,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380574335] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:07:15,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:07:15,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:07:15,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180595164] [2021-07-13 20:07:15,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:07:15,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:15,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:07:15,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:07:15,454 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:15,474 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2021-07-13 20:07:15,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:07:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 20:07:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:15,476 INFO L225 Difference]: With dead ends: 86 [2021-07-13 20:07:15,476 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 20:07:15,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:07:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 20:07:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-07-13 20:07:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-07-13 20:07:15,482 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2021-07-13 20:07:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:15,482 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-07-13 20:07:15,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-07-13 20:07:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:07:15,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:15,483 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:15,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:07:15,483 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1100878499, now seen corresponding path program 3 times [2021-07-13 20:07:15,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:15,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274380331] [2021-07-13 20:07:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:15,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:15,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274380331] [2021-07-13 20:07:15,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274380331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:15,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325267205] [2021-07-13 20:07:15,500 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 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 [2021-07-13 20:07:15,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:07:15,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:15,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:07:15,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:15,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325267205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:15,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:15,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:07:15,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866581663] [2021-07-13 20:07:15,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:07:15,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:15,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:07:15,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:07:15,573 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:15,589 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-07-13 20:07:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:07:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:07:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:15,592 INFO L225 Difference]: With dead ends: 79 [2021-07-13 20:07:15,592 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 20:07:15,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:07:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 20:07:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-07-13 20:07:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-07-13 20:07:15,598 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2021-07-13 20:07:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:15,599 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-07-13 20:07:15,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-07-13 20:07:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:07:15,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:15,599 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:15,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:15,801 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:15,801 INFO L82 PathProgramCache]: Analyzing trace with hash -903089469, now seen corresponding path program 1 times [2021-07-13 20:07:15,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:15,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334581369] [2021-07-13 20:07:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:16,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334581369] [2021-07-13 20:07:16,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334581369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439294065] [2021-07-13 20:07:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:07:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:16,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:07:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:16,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:16,129 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 37 treesize of output 19 [2021-07-13 20:07:16,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:16,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:16,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:16,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-07-13 20:07:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439294065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:16,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:07:16,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794810749] [2021-07-13 20:07:16,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:07:16,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:16,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:07:16,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:07:16,151 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:16,177 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-07-13 20:07:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:07:16,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:07:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:16,178 INFO L225 Difference]: With dead ends: 106 [2021-07-13 20:07:16,178 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 20:07:16,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:07:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 20:07:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-07-13 20:07:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-07-13 20:07:16,184 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2021-07-13 20:07:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:16,184 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-07-13 20:07:16,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-07-13 20:07:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:07:16,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:16,185 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:16,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:16,402 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:16,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1021604339, now seen corresponding path program 2 times [2021-07-13 20:07:16,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:16,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940024353] [2021-07-13 20:07:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:16,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940024353] [2021-07-13 20:07:16,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940024353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628845145] [2021-07-13 20:07:16,487 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 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 [2021-07-13 20:07:16,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:16,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:07:16,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:16,631 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:16,631 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 37 treesize of output 19 [2021-07-13 20:07:16,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:16,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:16,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:16,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-07-13 20:07:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628845145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:16,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 20:07:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662793729] [2021-07-13 20:07:16,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:07:16,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:16,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:07:16,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:07:16,649 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:16,688 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2021-07-13 20:07:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:07:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:07:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:16,689 INFO L225 Difference]: With dead ends: 111 [2021-07-13 20:07:16,690 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 20:07:16,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:07:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 20:07:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-07-13 20:07:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-07-13 20:07:16,694 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2021-07-13 20:07:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:16,694 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-07-13 20:07:16,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-07-13 20:07:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:07:16,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:16,695 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:16,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:16,911 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:16,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1435130610, now seen corresponding path program 3 times [2021-07-13 20:07:16,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:16,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343940724] [2021-07-13 20:07:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:16,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343940724] [2021-07-13 20:07:16,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343940724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162208974] [2021-07-13 20:07:16,938 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 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 [2021-07-13 20:07:16,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:07:16,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:16,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:07:16,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162208974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:16,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:07:16,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018002149] [2021-07-13 20:07:16,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:07:16,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:16,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:07:16,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:07:16,994 INFO L87 Difference]: Start difference. First operand 82 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:17,008 INFO L93 Difference]: Finished difference Result 178 states and 344 transitions. [2021-07-13 20:07:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:07:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:07:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:17,010 INFO L225 Difference]: With dead ends: 178 [2021-07-13 20:07:17,010 INFO L226 Difference]: Without dead ends: 175 [2021-07-13 20:07:17,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:07:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-13 20:07:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2021-07-13 20:07:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2021-07-13 20:07:17,015 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 20 [2021-07-13 20:07:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:17,015 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2021-07-13 20:07:17,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2021-07-13 20:07:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:07:17,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:17,016 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:17,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:17,238 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1953390261, now seen corresponding path program 4 times [2021-07-13 20:07:17,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:17,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329181886] [2021-07-13 20:07:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:17,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:17,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329181886] [2021-07-13 20:07:17,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329181886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:17,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982501111] [2021-07-13 20:07:17,422 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 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 [2021-07-13 20:07:17,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:17,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:17,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:07:17,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:17,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:17,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:17,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:17,575 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 54 treesize of output 24 [2021-07-13 20:07:17,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:17,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:17,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:17,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-13 20:07:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:17,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982501111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:17,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:17,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:07:17,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743172732] [2021-07-13 20:07:17,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:07:17,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:07:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:07:17,603 INFO L87 Difference]: Start difference. First operand 100 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-07-13 20:07:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:17,692 INFO L93 Difference]: Finished difference Result 229 states and 467 transitions. [2021-07-13 20:07:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:07:17,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 [2021-07-13 20:07:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:17,693 INFO L225 Difference]: With dead ends: 229 [2021-07-13 20:07:17,693 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 20:07:17,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:07:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 20:07:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-07-13 20:07:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.048780487804878) internal successors, (252), 123 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 252 transitions. [2021-07-13 20:07:17,698 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 252 transitions. Word has length 23 [2021-07-13 20:07:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:17,698 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 252 transitions. [2021-07-13 20:07:17,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-07-13 20:07:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 252 transitions. [2021-07-13 20:07:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:07:17,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:17,699 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:17,917 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash -39199557, now seen corresponding path program 5 times [2021-07-13 20:07:17,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:17,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981195271] [2021-07-13 20:07:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:18,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:18,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981195271] [2021-07-13 20:07:18,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981195271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:18,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483413520] [2021-07-13 20:07:18,029 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 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 [2021-07-13 20:07:18,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:07:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:18,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:07:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:18,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:18,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:18,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:18,195 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 54 treesize of output 24 [2021-07-13 20:07:18,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:18,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-13 20:07:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:18,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483413520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:18,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:18,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:07:18,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520668279] [2021-07-13 20:07:18,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:07:18,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:18,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:07:18,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:07:18,212 INFO L87 Difference]: Start difference. First operand 124 states and 252 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-07-13 20:07:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:18,282 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-07-13 20:07:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:07:18,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 [2021-07-13 20:07:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:18,284 INFO L225 Difference]: With dead ends: 242 [2021-07-13 20:07:18,284 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 20:07:18,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:07:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 20:07:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2021-07-13 20:07:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 126 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 258 transitions. [2021-07-13 20:07:18,288 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 258 transitions. Word has length 23 [2021-07-13 20:07:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:18,288 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 258 transitions. [2021-07-13 20:07:18,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-07-13 20:07:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 258 transitions. [2021-07-13 20:07:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:07:18,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:18,289 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:18,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:18,506 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:18,506 INFO L82 PathProgramCache]: Analyzing trace with hash -493418373, now seen corresponding path program 6 times [2021-07-13 20:07:18,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:18,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961421284] [2021-07-13 20:07:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:18,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:18,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961421284] [2021-07-13 20:07:18,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961421284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:18,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140105842] [2021-07-13 20:07:18,631 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 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 [2021-07-13 20:07:18,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:07:18,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:07:18,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:18,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:18,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:18,758 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-13 20:07:18,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:18,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-13 20:07:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:18,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140105842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:18,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:18,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:07:18,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992335822] [2021-07-13 20:07:18,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:07:18,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:07:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:07:18,775 INFO L87 Difference]: Start difference. First operand 127 states and 258 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:18,937 INFO L93 Difference]: Finished difference Result 370 states and 737 transitions. [2021-07-13 20:07:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:07:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:07:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:18,939 INFO L225 Difference]: With dead ends: 370 [2021-07-13 20:07:18,939 INFO L226 Difference]: Without dead ends: 231 [2021-07-13 20:07:18,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-13 20:07:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-07-13 20:07:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-07-13 20:07:18,943 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 23 [2021-07-13 20:07:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:18,943 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-07-13 20:07:18,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-07-13 20:07:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:07:18,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:18,943 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:19,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 20:07:19,162 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:19,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:19,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1420772331, now seen corresponding path program 7 times [2021-07-13 20:07:19,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:19,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221049144] [2021-07-13 20:07:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:19,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221049144] [2021-07-13 20:07:19,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221049144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978805237] [2021-07-13 20:07:19,260 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 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 [2021-07-13 20:07:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:07:19,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:19,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:19,394 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-13 20:07:19,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:19,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:19,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:19,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-13 20:07:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978805237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:19,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:07:19,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694782948] [2021-07-13 20:07:19,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:07:19,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:19,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:07:19,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:07:19,410 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:19,501 INFO L93 Difference]: Finished difference Result 296 states and 627 transitions. [2021-07-13 20:07:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:19,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:07:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:19,502 INFO L225 Difference]: With dead ends: 296 [2021-07-13 20:07:19,502 INFO L226 Difference]: Without dead ends: 244 [2021-07-13 20:07:19,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:07:19,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-13 20:07:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 115. [2021-07-13 20:07:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 114 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 234 transitions. [2021-07-13 20:07:19,506 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 234 transitions. Word has length 23 [2021-07-13 20:07:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:19,506 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 234 transitions. [2021-07-13 20:07:19,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 234 transitions. [2021-07-13 20:07:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:07:19,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:19,507 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:19,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:19,714 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 631142011, now seen corresponding path program 8 times [2021-07-13 20:07:19,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:19,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134024467] [2021-07-13 20:07:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:19,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134024467] [2021-07-13 20:07:19,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134024467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631828548] [2021-07-13 20:07:19,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:19,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:19,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:07:19,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:19,960 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:07:19,960 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 54 treesize of output 24 [2021-07-13 20:07:19,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:19,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:19,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:19,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-07-13 20:07:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631828548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:19,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:07:19,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682799562] [2021-07-13 20:07:19,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:07:19,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:19,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:07:19,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:07:19,974 INFO L87 Difference]: Start difference. First operand 115 states and 234 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:20,053 INFO L93 Difference]: Finished difference Result 174 states and 355 transitions. [2021-07-13 20:07:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:07:20,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:07:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:20,054 INFO L225 Difference]: With dead ends: 174 [2021-07-13 20:07:20,054 INFO L226 Difference]: Without dead ends: 159 [2021-07-13 20:07:20,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:07:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-13 20:07:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2021-07-13 20:07:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 249 transitions. [2021-07-13 20:07:20,056 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 249 transitions. Word has length 23 [2021-07-13 20:07:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:20,057 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 249 transitions. [2021-07-13 20:07:20,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,057 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 249 transitions. [2021-07-13 20:07:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:07:20,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:20,057 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:20,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:20,274 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:20,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:20,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2079266966, now seen corresponding path program 9 times [2021-07-13 20:07:20,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:20,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624709787] [2021-07-13 20:07:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:20,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:20,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624709787] [2021-07-13 20:07:20,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624709787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:20,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301363924] [2021-07-13 20:07:20,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:20,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:07:20,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:20,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:07:20,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:20,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301363924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:20,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:20,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:07:20,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455605104] [2021-07-13 20:07:20,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:07:20,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:07:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:07:20,398 INFO L87 Difference]: Start difference. First operand 122 states and 249 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:20,414 INFO L93 Difference]: Finished difference Result 258 states and 510 transitions. [2021-07-13 20:07:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:07:20,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:07:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:20,415 INFO L225 Difference]: With dead ends: 258 [2021-07-13 20:07:20,415 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 20:07:20,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:07:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 20:07:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 144. [2021-07-13 20:07:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.104895104895105) internal successors, (301), 143 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 301 transitions. [2021-07-13 20:07:20,418 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 301 transitions. Word has length 24 [2021-07-13 20:07:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:20,418 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 301 transitions. [2021-07-13 20:07:20,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 301 transitions. [2021-07-13 20:07:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:07:20,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:20,419 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:20,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:07:20,636 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:20,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:20,636 INFO L82 PathProgramCache]: Analyzing trace with hash 573026147, now seen corresponding path program 10 times [2021-07-13 20:07:20,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:20,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718535202] [2021-07-13 20:07:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:20,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:20,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718535202] [2021-07-13 20:07:20,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718535202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:20,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424287365] [2021-07-13 20:07:20,782 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 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 [2021-07-13 20:07:20,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:20,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:20,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:07:20,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:21,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:07:21,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:21,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:07:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:21,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424287365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:21,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:21,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:07:21,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622223925] [2021-07-13 20:07:21,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:07:21,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:07:21,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:07:21,064 INFO L87 Difference]: Start difference. First operand 144 states and 301 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:21,265 INFO L93 Difference]: Finished difference Result 412 states and 832 transitions. [2021-07-13 20:07:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:07:21,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:07:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:21,267 INFO L225 Difference]: With dead ends: 412 [2021-07-13 20:07:21,267 INFO L226 Difference]: Without dead ends: 275 [2021-07-13 20:07:21,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:07:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-13 20:07:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-07-13 20:07:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.0324324324324325) internal successors, (376), 185 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 376 transitions. [2021-07-13 20:07:21,271 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 376 transitions. Word has length 27 [2021-07-13 20:07:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:21,271 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 376 transitions. [2021-07-13 20:07:21,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 376 transitions. [2021-07-13 20:07:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:07:21,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:21,271 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:21,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:07:21,484 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1797247341, now seen corresponding path program 11 times [2021-07-13 20:07:21,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:21,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004097724] [2021-07-13 20:07:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:21,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004097724] [2021-07-13 20:07:21,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004097724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429888048] [2021-07-13 20:07:21,614 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 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 [2021-07-13 20:07:21,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:07:21,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:07:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:21,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:21,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:21,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:21,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:07:21,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:21,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:07:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:21,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429888048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:21,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:21,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:07:21,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864733678] [2021-07-13 20:07:21,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:07:21,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:21,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:07:21,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:07:21,890 INFO L87 Difference]: Start difference. First operand 186 states and 376 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:21,967 INFO L93 Difference]: Finished difference Result 449 states and 948 transitions. [2021-07-13 20:07:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:21,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:07:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:21,968 INFO L225 Difference]: With dead ends: 449 [2021-07-13 20:07:21,968 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 20:07:21,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:07:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 20:07:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2021-07-13 20:07:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-07-13 20:07:21,974 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-07-13 20:07:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:21,974 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-07-13 20:07:21,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-07-13 20:07:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:07:21,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:21,975 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:22,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:07:22,191 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2033685859, now seen corresponding path program 12 times [2021-07-13 20:07:22,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:22,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633467977] [2021-07-13 20:07:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:22,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:22,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633467977] [2021-07-13 20:07:22,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633467977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:22,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317527479] [2021-07-13 20:07:22,363 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 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 [2021-07-13 20:07:22,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:07:22,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:22,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:07:22,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:22,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:22,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:22,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:22,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:22,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:07:22,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:22,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:22,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:22,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:07:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:22,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317527479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:22,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:22,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:07:22,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545919257] [2021-07-13 20:07:22,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:07:22,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:22,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:07:22,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:07:22,682 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:22,852 INFO L93 Difference]: Finished difference Result 418 states and 869 transitions. [2021-07-13 20:07:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:22,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:07:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:22,853 INFO L225 Difference]: With dead ends: 418 [2021-07-13 20:07:22,853 INFO L226 Difference]: Without dead ends: 381 [2021-07-13 20:07:22,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:07:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-13 20:07:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 204. [2021-07-13 20:07:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-07-13 20:07:22,858 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-07-13 20:07:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:22,858 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-07-13 20:07:22,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-07-13 20:07:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:07:22,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:22,859 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:23,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:23,078 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:23,078 INFO L82 PathProgramCache]: Analyzing trace with hash 482737811, now seen corresponding path program 13 times [2021-07-13 20:07:23,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:23,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513541642] [2021-07-13 20:07:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:23,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:23,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513541642] [2021-07-13 20:07:23,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513541642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:23,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837496485] [2021-07-13 20:07:23,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:23,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:07:23,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:23,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:23,424 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 73 treesize of output 31 [2021-07-13 20:07:23,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:23,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:07:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:23,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837496485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:23,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:23,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-07-13 20:07:23,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968620025] [2021-07-13 20:07:23,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:07:23,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:07:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:23,446 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:23,667 INFO L93 Difference]: Finished difference Result 607 states and 1212 transitions. [2021-07-13 20:07:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:07:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:23,669 INFO L225 Difference]: With dead ends: 607 [2021-07-13 20:07:23,669 INFO L226 Difference]: Without dead ends: 443 [2021-07-13 20:07:23,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:07:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-13 20:07:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-07-13 20:07:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.9923076923076923) internal successors, (518), 260 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 518 transitions. [2021-07-13 20:07:23,674 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 518 transitions. Word has length 27 [2021-07-13 20:07:23,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:23,675 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 518 transitions. [2021-07-13 20:07:23,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 518 transitions. [2021-07-13 20:07:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:07:23,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:23,676 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:23,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:23,889 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1943397523, now seen corresponding path program 14 times [2021-07-13 20:07:23,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:23,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262818953] [2021-07-13 20:07:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:24,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:24,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262818953] [2021-07-13 20:07:24,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262818953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:24,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875256338] [2021-07-13 20:07:24,012 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 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 [2021-07-13 20:07:24,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:24,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:24,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:07:24,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:24,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:24,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:24,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:24,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:24,219 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 73 treesize of output 31 [2021-07-13 20:07:24,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:24,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:24,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:24,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:07:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:24,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875256338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:24,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:24,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:07:24,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349605123] [2021-07-13 20:07:24,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:07:24,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:24,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:07:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:07:24,235 INFO L87 Difference]: Start difference. First operand 261 states and 518 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:24,378 INFO L93 Difference]: Finished difference Result 566 states and 1153 transitions. [2021-07-13 20:07:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:24,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:07:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:24,380 INFO L225 Difference]: With dead ends: 566 [2021-07-13 20:07:24,380 INFO L226 Difference]: Without dead ends: 514 [2021-07-13 20:07:24,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:07:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-13 20:07:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 291. [2021-07-13 20:07:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.9758620689655173) internal successors, (573), 290 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 573 transitions. [2021-07-13 20:07:24,385 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 573 transitions. Word has length 27 [2021-07-13 20:07:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:24,386 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 573 transitions. [2021-07-13 20:07:24,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 573 transitions. [2021-07-13 20:07:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:07:24,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:24,386 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:24,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:24,602 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:24,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1497798365, now seen corresponding path program 15 times [2021-07-13 20:07:24,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:24,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360023045] [2021-07-13 20:07:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:24,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:24,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360023045] [2021-07-13 20:07:24,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360023045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:24,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686063995] [2021-07-13 20:07:24,739 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 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 [2021-07-13 20:07:24,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:07:24,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:24,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:07:24,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:25,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:25,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:25,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:25,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:25,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:25,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:25,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:25,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:25,017 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 67 treesize of output 31 [2021-07-13 20:07:25,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,034 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-07-13 20:07:25,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:7 [2021-07-13 20:07:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:25,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686063995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:25,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:25,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-07-13 20:07:25,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736758378] [2021-07-13 20:07:25,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:07:25,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:25,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:07:25,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:25,045 INFO L87 Difference]: Start difference. First operand 291 states and 573 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:25,485 INFO L93 Difference]: Finished difference Result 619 states and 1231 transitions. [2021-07-13 20:07:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:25,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:07:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:25,487 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:07:25,487 INFO L226 Difference]: Without dead ends: 501 [2021-07-13 20:07:25,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-13 20:07:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 321. [2021-07-13 20:07:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-07-13 20:07:25,492 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-07-13 20:07:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:25,492 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-07-13 20:07:25,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-07-13 20:07:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:07:25,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:25,493 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:25,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 20:07:25,709 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash -37138653, now seen corresponding path program 16 times [2021-07-13 20:07:25,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:25,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148632906] [2021-07-13 20:07:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:25,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:25,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148632906] [2021-07-13 20:07:25,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148632906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:25,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172601202] [2021-07-13 20:07:25,853 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 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 [2021-07-13 20:07:25,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:25,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:07:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:26,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:26,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:07:26,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:26,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:07:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:26,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172601202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:26,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:26,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-13 20:07:26,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704845005] [2021-07-13 20:07:26,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:07:26,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:07:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:26,148 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:26,266 INFO L93 Difference]: Finished difference Result 631 states and 1284 transitions. [2021-07-13 20:07:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:26,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:07:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:26,268 INFO L225 Difference]: With dead ends: 631 [2021-07-13 20:07:26,268 INFO L226 Difference]: Without dead ends: 579 [2021-07-13 20:07:26,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-13 20:07:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 321. [2021-07-13 20:07:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-07-13 20:07:26,274 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-07-13 20:07:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:26,274 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-07-13 20:07:26,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-07-13 20:07:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:07:26,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:26,275 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:26,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:07:26,491 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:26,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1537293741, now seen corresponding path program 17 times [2021-07-13 20:07:26,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:26,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190822728] [2021-07-13 20:07:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:26,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:26,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190822728] [2021-07-13 20:07:26,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190822728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:26,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262941276] [2021-07-13 20:07:26,621 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 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 [2021-07-13 20:07:26,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:07:26,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:26,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:07:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:26,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:26,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:26,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:07:26,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:26,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:07:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:26,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262941276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:26,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:26,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-13 20:07:26,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386537251] [2021-07-13 20:07:26,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:07:26,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:26,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:07:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:26,866 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2021-07-13 20:07:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:26,993 INFO L93 Difference]: Finished difference Result 654 states and 1288 transitions. [2021-07-13 20:07:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:07:26,993 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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 27 [2021-07-13 20:07:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:26,995 INFO L225 Difference]: With dead ends: 654 [2021-07-13 20:07:26,995 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 20:07:26,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 20:07:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 355. [2021-07-13 20:07:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.9802259887005649) internal successors, (701), 354 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 701 transitions. [2021-07-13 20:07:27,000 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 701 transitions. Word has length 27 [2021-07-13 20:07:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:27,001 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 701 transitions. [2021-07-13 20:07:27,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2021-07-13 20:07:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 701 transitions. [2021-07-13 20:07:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:27,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:27,001 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:27,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:07:27,217 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash -326297685, now seen corresponding path program 18 times [2021-07-13 20:07:27,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:27,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890145531] [2021-07-13 20:07:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:27,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:27,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890145531] [2021-07-13 20:07:27,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890145531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:27,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200592816] [2021-07-13 20:07:27,362 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 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 [2021-07-13 20:07:27,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:07:27,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:27,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:27,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:27,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:27,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:27,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:27,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:27,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:27,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:27,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:27,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:27,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:27,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200592816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:27,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:27,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 20:07:27,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799536736] [2021-07-13 20:07:27,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:07:27,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:07:27,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:27,693 INFO L87 Difference]: Start difference. First operand 355 states and 701 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:27,887 INFO L93 Difference]: Finished difference Result 666 states and 1349 transitions. [2021-07-13 20:07:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:27,889 INFO L225 Difference]: With dead ends: 666 [2021-07-13 20:07:27,890 INFO L226 Difference]: Without dead ends: 629 [2021-07-13 20:07:27,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-13 20:07:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 364. [2021-07-13 20:07:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.9724517906336088) internal successors, (716), 363 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 716 transitions. [2021-07-13 20:07:27,896 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 716 transitions. Word has length 31 [2021-07-13 20:07:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:27,896 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 716 transitions. [2021-07-13 20:07:27,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 716 transitions. [2021-07-13 20:07:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:27,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:27,897 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:28,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:07:28,109 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:28,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash 656635163, now seen corresponding path program 19 times [2021-07-13 20:07:28,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:28,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411020388] [2021-07-13 20:07:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:28,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411020388] [2021-07-13 20:07:28,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411020388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081316997] [2021-07-13 20:07:28,259 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 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 [2021-07-13 20:07:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:28,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:28,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:28,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:28,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:28,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:28,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:28,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:28,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:28,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081316997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:28,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:28,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:07:28,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875744778] [2021-07-13 20:07:28,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:07:28,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:07:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:07:28,603 INFO L87 Difference]: Start difference. First operand 364 states and 716 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:28,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:28,801 INFO L93 Difference]: Finished difference Result 559 states and 1114 transitions. [2021-07-13 20:07:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:28,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:28,803 INFO L225 Difference]: With dead ends: 559 [2021-07-13 20:07:28,803 INFO L226 Difference]: Without dead ends: 532 [2021-07-13 20:07:28,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:07:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-07-13 20:07:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 332. [2021-07-13 20:07:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.9667673716012084) internal successors, (651), 331 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 651 transitions. [2021-07-13 20:07:28,808 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 651 transitions. Word has length 31 [2021-07-13 20:07:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:28,817 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 651 transitions. [2021-07-13 20:07:28,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 651 transitions. [2021-07-13 20:07:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:28,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:28,817 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:29,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:07:29,018 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:29,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1781195547, now seen corresponding path program 20 times [2021-07-13 20:07:29,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:29,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704739715] [2021-07-13 20:07:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:29,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:29,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704739715] [2021-07-13 20:07:29,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704739715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:29,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561115118] [2021-07-13 20:07:29,157 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:29,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:29,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:29,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:29,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:29,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:29,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:29,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:29,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:29,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:29,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:29,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:29,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:29,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:29,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561115118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:29,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:29,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 20:07:29,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169558202] [2021-07-13 20:07:29,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:07:29,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:29,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:07:29,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:29,475 INFO L87 Difference]: Start difference. First operand 332 states and 651 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:29,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:29,634 INFO L93 Difference]: Finished difference Result 724 states and 1487 transitions. [2021-07-13 20:07:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:29,635 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:29,637 INFO L225 Difference]: With dead ends: 724 [2021-07-13 20:07:29,637 INFO L226 Difference]: Without dead ends: 666 [2021-07-13 20:07:29,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-13 20:07:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 287. [2021-07-13 20:07:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.013986013986014) internal successors, (576), 286 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 576 transitions. [2021-07-13 20:07:29,643 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 576 transitions. Word has length 31 [2021-07-13 20:07:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:29,644 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 576 transitions. [2021-07-13 20:07:29,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 576 transitions. [2021-07-13 20:07:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:29,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:29,644 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:29,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:29,861 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:29,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1328876565, now seen corresponding path program 21 times [2021-07-13 20:07:29,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:29,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121868734] [2021-07-13 20:07:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:30,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:30,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121868734] [2021-07-13 20:07:30,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121868734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:30,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027454816] [2021-07-13 20:07:30,013 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:30,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:07:30,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:30,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:30,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:30,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:30,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:30,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:30,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:30,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:30,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:30,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:30,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:30,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027454816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:30,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:30,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 20:07:30,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903463819] [2021-07-13 20:07:30,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:07:30,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:07:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:30,326 INFO L87 Difference]: Start difference. First operand 287 states and 576 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:30,565 INFO L93 Difference]: Finished difference Result 700 states and 1406 transitions. [2021-07-13 20:07:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:30,567 INFO L225 Difference]: With dead ends: 700 [2021-07-13 20:07:30,567 INFO L226 Difference]: Without dead ends: 523 [2021-07-13 20:07:30,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-07-13 20:07:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 326. [2021-07-13 20:07:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.9938461538461538) internal successors, (648), 325 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 648 transitions. [2021-07-13 20:07:30,574 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 648 transitions. Word has length 31 [2021-07-13 20:07:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:30,574 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 648 transitions. [2021-07-13 20:07:30,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 648 transitions. [2021-07-13 20:07:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:30,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:30,575 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:30,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:07:30,792 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:30,793 INFO L82 PathProgramCache]: Analyzing trace with hash -204316181, now seen corresponding path program 22 times [2021-07-13 20:07:30,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:30,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972104365] [2021-07-13 20:07:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:30,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:30,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972104365] [2021-07-13 20:07:30,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972104365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:30,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038080286] [2021-07-13 20:07:30,952 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:30,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:30,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:30,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:30,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:31,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:31,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:31,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:31,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:31,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:31,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:31,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:31,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038080286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:31,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:31,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:07:31,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738603452] [2021-07-13 20:07:31,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:07:31,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:07:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:07:31,296 INFO L87 Difference]: Start difference. First operand 326 states and 648 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:31,567 INFO L93 Difference]: Finished difference Result 672 states and 1391 transitions. [2021-07-13 20:07:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:31,568 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:31,569 INFO L225 Difference]: With dead ends: 672 [2021-07-13 20:07:31,570 INFO L226 Difference]: Without dead ends: 617 [2021-07-13 20:07:31,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:07:31,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-07-13 20:07:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 293. [2021-07-13 20:07:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-07-13 20:07:31,580 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 31 [2021-07-13 20:07:31,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:31,580 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-07-13 20:07:31,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-07-13 20:07:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:31,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:31,583 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:31,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:31,800 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1086947675, now seen corresponding path program 23 times [2021-07-13 20:07:31,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:31,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067199090] [2021-07-13 20:07:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:32,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:32,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067199090] [2021-07-13 20:07:32,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067199090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:32,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255560447] [2021-07-13 20:07:32,037 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:32,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:07:32,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:32,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:07:32,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:32,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:32,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:32,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:32,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:32,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:32,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:32,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 28 [2021-07-13 20:07:32,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:32,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:32,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:32,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:3 [2021-07-13 20:07:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:32,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255560447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:32,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:32,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:07:32,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926076555] [2021-07-13 20:07:32,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:07:32,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:32,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:07:32,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:07:32,525 INFO L87 Difference]: Start difference. First operand 293 states and 588 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) [2021-07-13 20:07:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:33,354 INFO L93 Difference]: Finished difference Result 703 states and 1400 transitions. [2021-07-13 20:07:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:07:33,355 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 31 [2021-07-13 20:07:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:33,356 INFO L225 Difference]: With dead ends: 703 [2021-07-13 20:07:33,356 INFO L226 Difference]: Without dead ends: 485 [2021-07-13 20:07:33,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 959.6ms TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:07:33,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-07-13 20:07:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 323. [2021-07-13 20:07:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.9968944099378882) internal successors, (643), 322 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 643 transitions. [2021-07-13 20:07:33,362 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 643 transitions. Word has length 31 [2021-07-13 20:07:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:33,362 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 643 transitions. [2021-07-13 20:07:33,362 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) [2021-07-13 20:07:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 643 transitions. [2021-07-13 20:07:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:33,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:33,363 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:33,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:07:33,579 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:33,579 INFO L82 PathProgramCache]: Analyzing trace with hash 407681163, now seen corresponding path program 24 times [2021-07-13 20:07:33,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:33,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086676653] [2021-07-13 20:07:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:33,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:33,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086676653] [2021-07-13 20:07:33,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086676653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:33,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933663334] [2021-07-13 20:07:33,738 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:33,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:07:33,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:33,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:33,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:34,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:34,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:34,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:34,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:34,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:34,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933663334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:34,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:34,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 20:07:34,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920182338] [2021-07-13 20:07:34,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:07:34,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:34,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:07:34,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:34,046 INFO L87 Difference]: Start difference. First operand 323 states and 643 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-07-13 20:07:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:34,336 INFO L93 Difference]: Finished difference Result 636 states and 1284 transitions. [2021-07-13 20:07:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:07:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 31 [2021-07-13 20:07:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:34,338 INFO L225 Difference]: With dead ends: 636 [2021-07-13 20:07:34,338 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 20:07:34,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:07:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 20:07:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 305. [2021-07-13 20:07:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.0065789473684212) internal successors, (610), 304 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 610 transitions. [2021-07-13 20:07:34,344 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 610 transitions. Word has length 31 [2021-07-13 20:07:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:34,344 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 610 transitions. [2021-07-13 20:07:34,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-07-13 20:07:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 610 transitions. [2021-07-13 20:07:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:34,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:34,344 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:34,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:34,557 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:34,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:34,557 INFO L82 PathProgramCache]: Analyzing trace with hash -574822485, now seen corresponding path program 25 times [2021-07-13 20:07:34,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:34,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009906587] [2021-07-13 20:07:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:34,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:34,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009906587] [2021-07-13 20:07:34,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009906587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:34,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103448546] [2021-07-13 20:07:34,716 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:34,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:34,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:34,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:34,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103448546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:34,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:34,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-07-13 20:07:34,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19396152] [2021-07-13 20:07:34,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:07:34,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:07:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:07:34,986 INFO L87 Difference]: Start difference. First operand 305 states and 610 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:35,306 INFO L93 Difference]: Finished difference Result 779 states and 1533 transitions. [2021-07-13 20:07:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:07:35,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:35,308 INFO L225 Difference]: With dead ends: 779 [2021-07-13 20:07:35,308 INFO L226 Difference]: Without dead ends: 565 [2021-07-13 20:07:35,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-13 20:07:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 352. [2021-07-13 20:07:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.9658119658119657) internal successors, (690), 351 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 690 transitions. [2021-07-13 20:07:35,314 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 690 transitions. Word has length 31 [2021-07-13 20:07:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:35,314 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 690 transitions. [2021-07-13 20:07:35,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 690 transitions. [2021-07-13 20:07:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:35,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:35,314 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:35,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:07:35,531 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:35,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1100362325, now seen corresponding path program 26 times [2021-07-13 20:07:35,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:35,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133026267] [2021-07-13 20:07:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:35,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:35,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133026267] [2021-07-13 20:07:35,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133026267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:35,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738799473] [2021-07-13 20:07:35,704 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:07:35,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:35,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:35,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:35,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:35,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:35,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:35,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:35,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:35,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:35,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:35,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:35,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:35,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738799473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:35,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:35,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-07-13 20:07:35,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200995394] [2021-07-13 20:07:35,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:07:35,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:35,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:07:35,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:07:35,986 INFO L87 Difference]: Start difference. First operand 352 states and 690 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:36,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:36,278 INFO L93 Difference]: Finished difference Result 731 states and 1404 transitions. [2021-07-13 20:07:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:07:36,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:36,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:36,280 INFO L225 Difference]: With dead ends: 731 [2021-07-13 20:07:36,280 INFO L226 Difference]: Without dead ends: 505 [2021-07-13 20:07:36,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-13 20:07:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-07-13 20:07:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.8725868725868726) internal successors, (485), 259 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 485 transitions. [2021-07-13 20:07:36,285 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 485 transitions. Word has length 31 [2021-07-13 20:07:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:36,285 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 485 transitions. [2021-07-13 20:07:36,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 485 transitions. [2021-07-13 20:07:36,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:36,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:36,285 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:36,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:36,501 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:36,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1315461915, now seen corresponding path program 27 times [2021-07-13 20:07:36,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:36,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463054838] [2021-07-13 20:07:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:36,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:36,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463054838] [2021-07-13 20:07:36,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463054838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:36,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625658292] [2021-07-13 20:07:36,663 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:36,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:07:36,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:36,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:07:36,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:36,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:36,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:37,002 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:07:37,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:37,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:110, output treesize:7 [2021-07-13 20:07:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:37,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625658292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:37,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:37,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 20:07:37,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959395836] [2021-07-13 20:07:37,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:07:37,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:37,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:07:37,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:07:37,013 INFO L87 Difference]: Start difference. First operand 260 states and 485 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:37,752 INFO L93 Difference]: Finished difference Result 858 states and 1666 transitions. [2021-07-13 20:07:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:07:37,764 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:37,766 INFO L225 Difference]: With dead ends: 858 [2021-07-13 20:07:37,766 INFO L226 Difference]: Without dead ends: 613 [2021-07-13 20:07:37,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 741.6ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:07:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-13 20:07:37,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 333. [2021-07-13 20:07:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.9216867469879517) internal successors, (638), 332 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 638 transitions. [2021-07-13 20:07:37,781 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 638 transitions. Word has length 31 [2021-07-13 20:07:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:37,781 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 638 transitions. [2021-07-13 20:07:37,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 638 transitions. [2021-07-13 20:07:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:37,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:37,782 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:37,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:07:37,997 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:37,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1773283547, now seen corresponding path program 28 times [2021-07-13 20:07:37,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:37,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253305774] [2021-07-13 20:07:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:38,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:38,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253305774] [2021-07-13 20:07:38,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253305774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:38,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832371928] [2021-07-13 20:07:38,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:38,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:38,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:38,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:38,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:38,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:38,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:38,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:38,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:38,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832371928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:38,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:38,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-07-13 20:07:38,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383095756] [2021-07-13 20:07:38,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:07:38,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:38,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:07:38,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:07:38,508 INFO L87 Difference]: Start difference. First operand 333 states and 638 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:38,856 INFO L93 Difference]: Finished difference Result 821 states and 1585 transitions. [2021-07-13 20:07:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:07:38,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:38,859 INFO L225 Difference]: With dead ends: 821 [2021-07-13 20:07:38,859 INFO L226 Difference]: Without dead ends: 610 [2021-07-13 20:07:38,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-13 20:07:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 402. [2021-07-13 20:07:38,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.887780548628429) internal successors, (757), 401 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 757 transitions. [2021-07-13 20:07:38,866 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 757 transitions. Word has length 31 [2021-07-13 20:07:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:38,866 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 757 transitions. [2021-07-13 20:07:38,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 757 transitions. [2021-07-13 20:07:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:38,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:38,867 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:39,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:39,083 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash -607493045, now seen corresponding path program 29 times [2021-07-13 20:07:39,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:39,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712906827] [2021-07-13 20:07:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:39,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:39,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712906827] [2021-07-13 20:07:39,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712906827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:39,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34976087] [2021-07-13 20:07:39,239 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:39,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:07:39,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:39,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:39,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:39,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:39,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:39,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:39,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:39,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:39,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:39,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:39,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34976087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:39,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:39,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-07-13 20:07:39,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176278092] [2021-07-13 20:07:39,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:07:39,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:07:39,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:07:39,562 INFO L87 Difference]: Start difference. First operand 402 states and 757 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:39,724 INFO L93 Difference]: Finished difference Result 762 states and 1488 transitions. [2021-07-13 20:07:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:39,727 INFO L225 Difference]: With dead ends: 762 [2021-07-13 20:07:39,727 INFO L226 Difference]: Without dead ends: 717 [2021-07-13 20:07:39,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:07:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-13 20:07:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 393. [2021-07-13 20:07:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.885204081632653) internal successors, (739), 392 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 739 transitions. [2021-07-13 20:07:39,734 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 739 transitions. Word has length 31 [2021-07-13 20:07:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:39,734 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 739 transitions. [2021-07-13 20:07:39,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 739 transitions. [2021-07-13 20:07:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:39,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:39,735 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:39,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:07:39,935 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash -105859509, now seen corresponding path program 30 times [2021-07-13 20:07:39,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:39,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012109776] [2021-07-13 20:07:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:40,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:40,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012109776] [2021-07-13 20:07:40,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012109776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:40,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604177578] [2021-07-13 20:07:40,120 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:40,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:07:40,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:40,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:40,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:40,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:40,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:40,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:40,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:07:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:40,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604177578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:40,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:40,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-07-13 20:07:40,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459584395] [2021-07-13 20:07:40,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:07:40,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:40,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:07:40,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:07:40,378 INFO L87 Difference]: Start difference. First operand 393 states and 739 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:40,537 INFO L93 Difference]: Finished difference Result 745 states and 1468 transitions. [2021-07-13 20:07:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:40,539 INFO L225 Difference]: With dead ends: 745 [2021-07-13 20:07:40,539 INFO L226 Difference]: Without dead ends: 700 [2021-07-13 20:07:40,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:07:40,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-07-13 20:07:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 414. [2021-07-13 20:07:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.8934624697336562) internal successors, (782), 413 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 782 transitions. [2021-07-13 20:07:40,546 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 782 transitions. Word has length 31 [2021-07-13 20:07:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:40,546 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 782 transitions. [2021-07-13 20:07:40,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,546 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 782 transitions. [2021-07-13 20:07:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:40,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:40,546 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:40,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:07:40,763 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1268614363, now seen corresponding path program 31 times [2021-07-13 20:07:40,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:40,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454980149] [2021-07-13 20:07:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:40,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:40,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454980149] [2021-07-13 20:07:40,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454980149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:40,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443561837] [2021-07-13 20:07:40,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:40,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:40,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:41,129 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-07-13 20:07:41,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:07:41,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:41,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:41,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:41,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-07-13 20:07:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:41,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443561837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:41,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:41,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-07-13 20:07:41,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715370626] [2021-07-13 20:07:41,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:07:41,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:41,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:07:41,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:07:41,144 INFO L87 Difference]: Start difference. First operand 414 states and 782 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:41,347 INFO L93 Difference]: Finished difference Result 609 states and 1180 transitions. [2021-07-13 20:07:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:07:41,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:41,348 INFO L225 Difference]: With dead ends: 609 [2021-07-13 20:07:41,349 INFO L226 Difference]: Without dead ends: 594 [2021-07-13 20:07:41,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:07:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-13 20:07:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 421. [2021-07-13 20:07:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.8976190476190475) internal successors, (797), 420 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 797 transitions. [2021-07-13 20:07:41,355 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 797 transitions. Word has length 31 [2021-07-13 20:07:41,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:41,355 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 797 transitions. [2021-07-13 20:07:41,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,355 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 797 transitions. [2021-07-13 20:07:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:07:41,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:41,355 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:41,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:07:41,572 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash -416618662, now seen corresponding path program 32 times [2021-07-13 20:07:41,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:41,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35012795] [2021-07-13 20:07:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:41,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:41,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35012795] [2021-07-13 20:07:41,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35012795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:41,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370812515] [2021-07-13 20:07:41,605 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:41,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:41,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:07:41,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:41,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370812515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:41,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:41,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 20:07:41,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489970314] [2021-07-13 20:07:41,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:07:41,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:41,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:07:41,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:07:41,695 INFO L87 Difference]: Start difference. First operand 421 states and 797 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:41,716 INFO L93 Difference]: Finished difference Result 646 states and 1247 transitions. [2021-07-13 20:07:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:07:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:07:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:41,719 INFO L225 Difference]: With dead ends: 646 [2021-07-13 20:07:41,719 INFO L226 Difference]: Without dead ends: 640 [2021-07-13 20:07:41,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:07:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-13 20:07:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 540. [2021-07-13 20:07:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.0037105751391464) internal successors, (1080), 539 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1080 transitions. [2021-07-13 20:07:41,750 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1080 transitions. Word has length 32 [2021-07-13 20:07:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:41,750 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1080 transitions. [2021-07-13 20:07:41,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,750 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1080 transitions. [2021-07-13 20:07:41,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:07:41,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:41,751 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:41,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:07:41,964 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:41,964 INFO L82 PathProgramCache]: Analyzing trace with hash 502506762, now seen corresponding path program 33 times [2021-07-13 20:07:41,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:41,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690154847] [2021-07-13 20:07:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:42,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:42,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690154847] [2021-07-13 20:07:42,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690154847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499771790] [2021-07-13 20:07:42,014 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:42,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:07:42,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:07:42,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:42,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499771790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:42,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 20:07:42,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349159545] [2021-07-13 20:07:42,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:07:42,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:07:42,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:07:42,093 INFO L87 Difference]: Start difference. First operand 540 states and 1080 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:42,117 INFO L93 Difference]: Finished difference Result 817 states and 1634 transitions. [2021-07-13 20:07:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:07:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:07:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:42,120 INFO L225 Difference]: With dead ends: 817 [2021-07-13 20:07:42,120 INFO L226 Difference]: Without dead ends: 811 [2021-07-13 20:07:42,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:07:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-07-13 20:07:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 585. [2021-07-13 20:07:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.0256849315068495) internal successors, (1183), 584 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1183 transitions. [2021-07-13 20:07:42,127 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1183 transitions. Word has length 32 [2021-07-13 20:07:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:42,127 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1183 transitions. [2021-07-13 20:07:42,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1183 transitions. [2021-07-13 20:07:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:42,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:42,128 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:42,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:07:42,345 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1113334029, now seen corresponding path program 34 times [2021-07-13 20:07:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:42,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940069724] [2021-07-13 20:07:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:42,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:42,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940069724] [2021-07-13 20:07:42,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940069724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188696516] [2021-07-13 20:07:42,532 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:42,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:42,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:42,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:42,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:42,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:42,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:42,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:42,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:42,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:42,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:07:42,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:42,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:07:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:42,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188696516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:42,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-07-13 20:07:42,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075638459] [2021-07-13 20:07:42,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:07:42,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:07:42,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:07:42,968 INFO L87 Difference]: Start difference. First operand 585 states and 1183 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-07-13 20:07:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:43,312 INFO L93 Difference]: Finished difference Result 1500 states and 3118 transitions. [2021-07-13 20:07:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:07:43,313 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 35 [2021-07-13 20:07:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:43,316 INFO L225 Difference]: With dead ends: 1500 [2021-07-13 20:07:43,316 INFO L226 Difference]: Without dead ends: 1408 [2021-07-13 20:07:43,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 441.0ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:07:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-07-13 20:07:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 627. [2021-07-13 20:07:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.0143769968051117) internal successors, (1261), 626 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1261 transitions. [2021-07-13 20:07:43,326 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1261 transitions. Word has length 35 [2021-07-13 20:07:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:43,326 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1261 transitions. [2021-07-13 20:07:43,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-07-13 20:07:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1261 transitions. [2021-07-13 20:07:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:43,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:43,327 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:43,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:07:43,527 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:43,528 INFO L82 PathProgramCache]: Analyzing trace with hash 382694851, now seen corresponding path program 35 times [2021-07-13 20:07:43,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:43,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311137541] [2021-07-13 20:07:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:43,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:43,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311137541] [2021-07-13 20:07:43,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311137541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:43,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027869024] [2021-07-13 20:07:43,732 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:43,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:07:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:43,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:43,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:44,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:44,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:44,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:44,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:44,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:44,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:07:44,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:44,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:44,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:44,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:07:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:44,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027869024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:44,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:44,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 20:07:44,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866927909] [2021-07-13 20:07:44,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:44,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:44,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:44,193 INFO L87 Difference]: Start difference. First operand 627 states and 1261 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) [2021-07-13 20:07:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:44,470 INFO L93 Difference]: Finished difference Result 1498 states and 3132 transitions. [2021-07-13 20:07:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:07:44,471 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 35 [2021-07-13 20:07:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:44,474 INFO L225 Difference]: With dead ends: 1498 [2021-07-13 20:07:44,474 INFO L226 Difference]: Without dead ends: 1403 [2021-07-13 20:07:44,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-07-13 20:07:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 543. [2021-07-13 20:07:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.0387453874538743) internal successors, (1105), 542 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1105 transitions. [2021-07-13 20:07:44,483 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1105 transitions. Word has length 35 [2021-07-13 20:07:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:44,483 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1105 transitions. [2021-07-13 20:07:44,483 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) [2021-07-13 20:07:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1105 transitions. [2021-07-13 20:07:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:44,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:44,484 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:44,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 20:07:44,701 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1079804723, now seen corresponding path program 36 times [2021-07-13 20:07:44,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:44,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553915955] [2021-07-13 20:07:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:44,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:44,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553915955] [2021-07-13 20:07:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553915955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:44,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261761341] [2021-07-13 20:07:44,884 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:44,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:07:44,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:44,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:45,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:45,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:45,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:45,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:45,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:07:45,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:45,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:45,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:45,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:07:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:45,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261761341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:45,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:45,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-07-13 20:07:45,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31407564] [2021-07-13 20:07:45,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:07:45,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:07:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:07:45,356 INFO L87 Difference]: Start difference. First operand 543 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-07-13 20:07:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:45,578 INFO L93 Difference]: Finished difference Result 1268 states and 2646 transitions. [2021-07-13 20:07:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:45,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 35 [2021-07-13 20:07:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:45,581 INFO L225 Difference]: With dead ends: 1268 [2021-07-13 20:07:45,581 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 20:07:45,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:07:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 20:07:45,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 573. [2021-07-13 20:07:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-07-13 20:07:45,589 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-07-13 20:07:45,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:45,589 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-07-13 20:07:45,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-07-13 20:07:45,590 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-07-13 20:07:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:45,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:45,590 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:45,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:45,806 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:45,807 INFO L82 PathProgramCache]: Analyzing trace with hash -884384461, now seen corresponding path program 37 times [2021-07-13 20:07:45,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:45,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726548985] [2021-07-13 20:07:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:46,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:46,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726548985] [2021-07-13 20:07:46,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726548985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:46,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593008548] [2021-07-13 20:07:46,019 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:07:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:46,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:46,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:46,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:46,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:46,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:46,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:46,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:07:46,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:46,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:46,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:46,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:07:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:46,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593008548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:46,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:46,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 20:07:46,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742076823] [2021-07-13 20:07:46,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:46,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:46,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:46,464 INFO L87 Difference]: Start difference. First operand 573 states and 1158 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) [2021-07-13 20:07:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:46,717 INFO L93 Difference]: Finished difference Result 1258 states and 2602 transitions. [2021-07-13 20:07:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:07:46,717 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 35 [2021-07-13 20:07:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:46,720 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 20:07:46,720 INFO L226 Difference]: Without dead ends: 1204 [2021-07-13 20:07:46,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-07-13 20:07:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 567. [2021-07-13 20:07:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.0247349823321557) internal successors, (1146), 566 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1146 transitions. [2021-07-13 20:07:46,728 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1146 transitions. Word has length 35 [2021-07-13 20:07:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:46,728 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1146 transitions. [2021-07-13 20:07:46,728 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) [2021-07-13 20:07:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1146 transitions. [2021-07-13 20:07:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:46,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:46,729 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:46,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:46,946 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:46,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:46,946 INFO L82 PathProgramCache]: Analyzing trace with hash -144551933, now seen corresponding path program 38 times [2021-07-13 20:07:46,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:46,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752342474] [2021-07-13 20:07:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:47,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:47,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752342474] [2021-07-13 20:07:47,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752342474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:47,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293916032] [2021-07-13 20:07:47,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:47,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:47,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:47,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:47,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:47,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:47,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:47,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:47,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:47,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:47,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:07:47,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:47,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:47,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:47,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:07:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:47,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293916032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:47,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:47,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-13 20:07:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571526649] [2021-07-13 20:07:47,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:47,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:47,594 INFO L87 Difference]: Start difference. First operand 567 states and 1146 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) [2021-07-13 20:07:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:47,894 INFO L93 Difference]: Finished difference Result 934 states and 1907 transitions. [2021-07-13 20:07:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:47,894 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 35 [2021-07-13 20:07:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:47,896 INFO L225 Difference]: With dead ends: 934 [2021-07-13 20:07:47,896 INFO L226 Difference]: Without dead ends: 913 [2021-07-13 20:07:47,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-07-13 20:07:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 573. [2021-07-13 20:07:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-07-13 20:07:47,903 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-07-13 20:07:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:47,903 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-07-13 20:07:47,903 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) [2021-07-13 20:07:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-07-13 20:07:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:47,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:47,904 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:48,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:48,121 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash 894968627, now seen corresponding path program 39 times [2021-07-13 20:07:48,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:48,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989322087] [2021-07-13 20:07:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:48,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:48,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989322087] [2021-07-13 20:07:48,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989322087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:48,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787275726] [2021-07-13 20:07:48,340 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:48,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:07:48,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:48,414 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:49,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:49,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:49,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:49,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-07-13 20:07:49,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:49,862 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-07-13 20:07:49,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:49,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:124, output treesize:7 [2021-07-13 20:07:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:49,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787275726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:49,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:49,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-13 20:07:49,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304209534] [2021-07-13 20:07:49,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:07:49,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:07:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:49,872 INFO L87 Difference]: Start difference. First operand 573 states and 1158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:54,969 INFO L93 Difference]: Finished difference Result 1198 states and 2387 transitions. [2021-07-13 20:07:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:07:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:07:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:54,972 INFO L225 Difference]: With dead ends: 1198 [2021-07-13 20:07:54,972 INFO L226 Difference]: Without dead ends: 976 [2021-07-13 20:07:54,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3039.8ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-07-13 20:07:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 673. [2021-07-13 20:07:54,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.9970238095238095) internal successors, (1342), 672 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1342 transitions. [2021-07-13 20:07:54,980 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1342 transitions. Word has length 35 [2021-07-13 20:07:54,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:54,980 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 1342 transitions. [2021-07-13 20:07:54,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:54,980 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1342 transitions. [2021-07-13 20:07:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:54,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:54,981 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:55,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:07:55,182 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:55,183 INFO L82 PathProgramCache]: Analyzing trace with hash 855473251, now seen corresponding path program 40 times [2021-07-13 20:07:55,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:55,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141472170] [2021-07-13 20:07:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:55,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:55,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141472170] [2021-07-13 20:07:55,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141472170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:55,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753022586] [2021-07-13 20:07:55,404 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:55,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:55,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:55,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:55,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:55,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:55,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:55,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:55,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:55,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:07:55,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:55,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:55,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:55,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:07:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:55,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753022586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:55,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:55,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 20:07:55,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000118381] [2021-07-13 20:07:55,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:07:55,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:55,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:07:55,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:07:55,839 INFO L87 Difference]: Start difference. First operand 673 states and 1342 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:56,079 INFO L93 Difference]: Finished difference Result 1761 states and 3634 transitions. [2021-07-13 20:07:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:07:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:07:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:56,082 INFO L225 Difference]: With dead ends: 1761 [2021-07-13 20:07:56,082 INFO L226 Difference]: Without dead ends: 1632 [2021-07-13 20:07:56,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:07:56,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-07-13 20:07:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 763. [2021-07-13 20:07:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.9855643044619422) internal successors, (1513), 762 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1513 transitions. [2021-07-13 20:07:56,094 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1513 transitions. Word has length 35 [2021-07-13 20:07:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:56,094 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1513 transitions. [2021-07-13 20:07:56,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:56,094 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1513 transitions. [2021-07-13 20:07:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:56,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:56,095 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:56,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:56,312 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1595305779, now seen corresponding path program 41 times [2021-07-13 20:07:56,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:56,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965336152] [2021-07-13 20:07:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:56,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:56,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965336152] [2021-07-13 20:07:56,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965336152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:56,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507504628] [2021-07-13 20:07:56,514 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:56,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:07:56,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:56,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:07:56,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:57,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:57,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:57,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:57,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:57,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:57,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2021-07-13 20:07:57,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:57,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:57,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:57,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-07-13 20:07:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:57,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507504628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:57,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:57,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:07:57,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368610541] [2021-07-13 20:07:57,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:07:57,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:57,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:07:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:07:57,053 INFO L87 Difference]: Start difference. First operand 763 states and 1513 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:58,024 INFO L93 Difference]: Finished difference Result 1434 states and 2903 transitions. [2021-07-13 20:07:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:07:58,024 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:07:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:58,027 INFO L225 Difference]: With dead ends: 1434 [2021-07-13 20:07:58,027 INFO L226 Difference]: Without dead ends: 1212 [2021-07-13 20:07:58,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1059.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:07:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-07-13 20:07:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 799. [2021-07-13 20:07:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.9862155388471179) internal successors, (1585), 798 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1585 transitions. [2021-07-13 20:07:58,054 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1585 transitions. Word has length 35 [2021-07-13 20:07:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:58,054 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 1585 transitions. [2021-07-13 20:07:58,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1585 transitions. [2021-07-13 20:07:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:58,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:58,069 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:58,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:58,269 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash 41830851, now seen corresponding path program 42 times [2021-07-13 20:07:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:58,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406013539] [2021-07-13 20:07:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:58,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:58,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406013539] [2021-07-13 20:07:58,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406013539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:58,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463559224] [2021-07-13 20:07:58,540 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:58,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:07:58,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:58,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:58,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:58,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:58,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:58,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:58,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:07:58,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:58,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:58,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:58,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:07:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:58,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463559224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:58,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:58,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 20:07:58,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171908018] [2021-07-13 20:07:58,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:07:58,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:07:58,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:07:58,952 INFO L87 Difference]: Start difference. First operand 799 states and 1585 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-07-13 20:07:59,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:59,170 INFO L93 Difference]: Finished difference Result 1504 states and 3031 transitions. [2021-07-13 20:07:59,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:07:59,171 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 35 [2021-07-13 20:07:59,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:59,173 INFO L225 Difference]: With dead ends: 1504 [2021-07-13 20:07:59,173 INFO L226 Difference]: Without dead ends: 1463 [2021-07-13 20:07:59,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:07:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-07-13 20:07:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 826. [2021-07-13 20:07:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 1.9903030303030302) internal successors, (1642), 825 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1642 transitions. [2021-07-13 20:07:59,185 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1642 transitions. Word has length 35 [2021-07-13 20:07:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:59,185 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1642 transitions. [2021-07-13 20:07:59,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-07-13 20:07:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1642 transitions. [2021-07-13 20:07:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:59,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:59,186 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:59,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:07:59,401 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1721364211, now seen corresponding path program 43 times [2021-07-13 20:07:59,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:59,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153243218] [2021-07-13 20:07:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:59,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:59,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153243218] [2021-07-13 20:07:59,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153243218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:59,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725978153] [2021-07-13 20:07:59,655 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:59,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:59,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:00,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:00,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:08:00,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:00,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:00,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:00,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:08:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:00,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725978153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:00,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 20:08:00,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827575699] [2021-07-13 20:08:00,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:08:00,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:08:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:08:00,062 INFO L87 Difference]: Start difference. First operand 826 states and 1642 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:00,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:00,478 INFO L93 Difference]: Finished difference Result 1685 states and 3364 transitions. [2021-07-13 20:08:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:08:00,478 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:00,481 INFO L225 Difference]: With dead ends: 1685 [2021-07-13 20:08:00,481 INFO L226 Difference]: Without dead ends: 1455 [2021-07-13 20:08:00,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-07-13 20:08:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 996. [2021-07-13 20:08:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.977889447236181) internal successors, (1968), 995 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1968 transitions. [2021-07-13 20:08:00,495 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1968 transitions. Word has length 35 [2021-07-13 20:08:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:00,495 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 1968 transitions. [2021-07-13 20:08:00,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1968 transitions. [2021-07-13 20:08:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:00,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:00,496 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:00,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:08:00,712 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:00,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:00,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1665521843, now seen corresponding path program 44 times [2021-07-13 20:08:00,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:00,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817728792] [2021-07-13 20:08:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:08:00,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:00,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817728792] [2021-07-13 20:08:00,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817728792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610277576] [2021-07-13 20:08:00,887 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:00,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:00,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:00,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:01,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:01,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:08:01,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:01,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:01,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:01,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:08:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:01,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610277576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:01,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:01,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-07-13 20:08:01,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532438515] [2021-07-13 20:08:01,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:08:01,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:01,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:08:01,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:08:01,249 INFO L87 Difference]: Start difference. First operand 996 states and 1968 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:01,782 INFO L93 Difference]: Finished difference Result 1889 states and 3808 transitions. [2021-07-13 20:08:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:08:01,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:01,785 INFO L225 Difference]: With dead ends: 1889 [2021-07-13 20:08:01,785 INFO L226 Difference]: Without dead ends: 1691 [2021-07-13 20:08:01,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 594.6ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:08:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-07-13 20:08:01,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1029. [2021-07-13 20:08:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.9815175097276265) internal successors, (2037), 1028 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2037 transitions. [2021-07-13 20:08:01,799 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2037 transitions. Word has length 35 [2021-07-13 20:08:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:01,799 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 2037 transitions. [2021-07-13 20:08:01,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2037 transitions. [2021-07-13 20:08:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:01,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:01,800 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:02,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:08:02,017 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1526251277, now seen corresponding path program 45 times [2021-07-13 20:08:02,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:02,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204622327] [2021-07-13 20:08:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:02,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:02,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204622327] [2021-07-13 20:08:02,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204622327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:02,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745282650] [2021-07-13 20:08:02,210 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:02,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:08:02,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:02,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:08:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:02,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:02,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:02,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 43 [2021-07-13 20:08:02,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:02,679 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:08:02,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:02,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:127, output treesize:7 [2021-07-13 20:08:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:02,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745282650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:02,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:02,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-13 20:08:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700402433] [2021-07-13 20:08:02,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:08:02,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:08:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:08:02,690 INFO L87 Difference]: Start difference. First operand 1029 states and 2037 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:03,448 INFO L93 Difference]: Finished difference Result 2019 states and 3995 transitions. [2021-07-13 20:08:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:08:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:03,452 INFO L225 Difference]: With dead ends: 2019 [2021-07-13 20:08:03,452 INFO L226 Difference]: Without dead ends: 1805 [2021-07-13 20:08:03,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 925.0ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:08:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-07-13 20:08:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1140. [2021-07-13 20:08:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.9675153643546972) internal successors, (2241), 1139 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 2241 transitions. [2021-07-13 20:08:03,465 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 2241 transitions. Word has length 35 [2021-07-13 20:08:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:03,465 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 2241 transitions. [2021-07-13 20:08:03,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 2241 transitions. [2021-07-13 20:08:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:03,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:03,466 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:03,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:03,682 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:03,683 INFO L82 PathProgramCache]: Analyzing trace with hash -825914125, now seen corresponding path program 46 times [2021-07-13 20:08:03,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:03,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95809991] [2021-07-13 20:08:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:03,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:03,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95809991] [2021-07-13 20:08:03,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95809991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:03,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402816592] [2021-07-13 20:08:03,900 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:03,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:03,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:03,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:03,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:04,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:04,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:04,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:04,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:08:04,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:04,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:04,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:04,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:08:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:04,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402816592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:04,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:04,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-13 20:08:04,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819025524] [2021-07-13 20:08:04,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:08:04,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:08:04,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:08:04,270 INFO L87 Difference]: Start difference. First operand 1140 states and 2241 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:04,530 INFO L93 Difference]: Finished difference Result 2038 states and 4167 transitions. [2021-07-13 20:08:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:08:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:04,533 INFO L225 Difference]: With dead ends: 2038 [2021-07-13 20:08:04,533 INFO L226 Difference]: Without dead ends: 1919 [2021-07-13 20:08:04,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 432.5ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:08:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-07-13 20:08:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1155. [2021-07-13 20:08:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.9679376083188909) internal successors, (2271), 1154 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:04,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2271 transitions. [2021-07-13 20:08:04,548 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2271 transitions. Word has length 35 [2021-07-13 20:08:04,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:04,548 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2271 transitions. [2021-07-13 20:08:04,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2271 transitions. [2021-07-13 20:08:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:04,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:04,549 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:04,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:04,765 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2143963011, now seen corresponding path program 47 times [2021-07-13 20:08:04,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:04,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717907456] [2021-07-13 20:08:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:04,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:04,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717907456] [2021-07-13 20:08:04,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717907456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:04,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101753695] [2021-07-13 20:08:04,969 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:05,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:08:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:05,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:08:05,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:05,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:05,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:05,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 34 [2021-07-13 20:08:05,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:05,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:05,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:05,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:3 [2021-07-13 20:08:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:05,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101753695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:05,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:05,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-07-13 20:08:05,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807984530] [2021-07-13 20:08:05,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:05,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:05,497 INFO L87 Difference]: Start difference. First operand 1155 states and 2271 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:06,101 INFO L93 Difference]: Finished difference Result 1927 states and 3858 transitions. [2021-07-13 20:08:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:08:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:06,104 INFO L225 Difference]: With dead ends: 1927 [2021-07-13 20:08:06,104 INFO L226 Difference]: Without dead ends: 1781 [2021-07-13 20:08:06,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 763.7ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:08:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-07-13 20:08:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1224. [2021-07-13 20:08:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9754701553556828) internal successors, (2416), 1223 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2416 transitions. [2021-07-13 20:08:06,117 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2416 transitions. Word has length 35 [2021-07-13 20:08:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:06,117 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2416 transitions. [2021-07-13 20:08:06,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2416 transitions. [2021-07-13 20:08:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:06,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:06,119 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:06,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:08:06,335 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash -690344573, now seen corresponding path program 48 times [2021-07-13 20:08:06,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:06,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827263015] [2021-07-13 20:08:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:06,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:06,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827263015] [2021-07-13 20:08:06,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827263015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:06,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218997267] [2021-07-13 20:08:06,529 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:06,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:08:06,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:06,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:06,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:06,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:06,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:08:06,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:06,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:06,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:06,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:08:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:06,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218997267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:06,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:06,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-07-13 20:08:06,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769795252] [2021-07-13 20:08:06,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:08:06,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:06,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:08:06,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:08:06,885 INFO L87 Difference]: Start difference. First operand 1224 states and 2416 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:07,082 INFO L93 Difference]: Finished difference Result 2191 states and 4418 transitions. [2021-07-13 20:08:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:08:07,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:07,086 INFO L225 Difference]: With dead ends: 2191 [2021-07-13 20:08:07,086 INFO L226 Difference]: Without dead ends: 2131 [2021-07-13 20:08:07,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:08:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-07-13 20:08:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1191. [2021-07-13 20:08:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-07-13 20:08:07,100 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-07-13 20:08:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:07,100 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-07-13 20:08:07,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-07-13 20:08:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:07,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:07,101 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:07,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:07,318 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:07,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1450667133, now seen corresponding path program 49 times [2021-07-13 20:08:07,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:07,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40948660] [2021-07-13 20:08:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:07,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:07,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40948660] [2021-07-13 20:08:07,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40948660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:07,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563479787] [2021-07-13 20:08:07,581 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:07,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:08:07,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:07,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:07,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:07,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:08:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:07,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563479787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:07,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:07,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-07-13 20:08:07,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719623551] [2021-07-13 20:08:07,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:08:07,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:07,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:08:07,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:08:07,972 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:08,220 INFO L93 Difference]: Finished difference Result 1992 states and 4014 transitions. [2021-07-13 20:08:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:08:08,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:08,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:08,224 INFO L225 Difference]: With dead ends: 1992 [2021-07-13 20:08:08,224 INFO L226 Difference]: Without dead ends: 1936 [2021-07-13 20:08:08,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:08:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-07-13 20:08:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1191. [2021-07-13 20:08:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-07-13 20:08:08,239 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-07-13 20:08:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:08,240 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-07-13 20:08:08,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-07-13 20:08:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:08,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:08,241 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:08,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:08:08,454 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:08,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash 9304755, now seen corresponding path program 50 times [2021-07-13 20:08:08,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:08,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691440335] [2021-07-13 20:08:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:08,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:08,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691440335] [2021-07-13 20:08:08,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691440335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:08,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516001852] [2021-07-13 20:08:08,679 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:08,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:08,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:08,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:09,009 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-07-13 20:08:09,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:08:09,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:09,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:09,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:09,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-07-13 20:08:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:09,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516001852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:09,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:09,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-07-13 20:08:09,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154685517] [2021-07-13 20:08:09,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:08:09,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:09,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:08:09,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:08:09,023 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-07-13 20:08:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:09,258 INFO L93 Difference]: Finished difference Result 1629 states and 3230 transitions. [2021-07-13 20:08:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:08:09,258 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:09,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:09,260 INFO L225 Difference]: With dead ends: 1629 [2021-07-13 20:08:09,260 INFO L226 Difference]: Without dead ends: 1614 [2021-07-13 20:08:09,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:08:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-13 20:08:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1198. [2021-07-13 20:08:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.9724310776942355) internal successors, (2361), 1197 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2361 transitions. [2021-07-13 20:08:09,274 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2361 transitions. Word has length 35 [2021-07-13 20:08:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:09,275 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 2361 transitions. [2021-07-13 20:08:09,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-07-13 20:08:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2361 transitions. [2021-07-13 20:08:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:08:09,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:09,277 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:09,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:08:09,494 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 118614578, now seen corresponding path program 51 times [2021-07-13 20:08:09,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:09,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764968440] [2021-07-13 20:08:09,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:09,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:09,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764968440] [2021-07-13 20:08:09,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764968440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:09,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519539277] [2021-07-13 20:08:09,537 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:09,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:08:09,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:09,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:08:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:09,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519539277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:09,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:09,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 20:08:09,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994472711] [2021-07-13 20:08:09,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:08:09,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:08:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:08:09,685 INFO L87 Difference]: Start difference. First operand 1198 states and 2361 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:09,715 INFO L93 Difference]: Finished difference Result 1523 states and 3015 transitions. [2021-07-13 20:08:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:08:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:08:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:09,717 INFO L225 Difference]: With dead ends: 1523 [2021-07-13 20:08:09,717 INFO L226 Difference]: Without dead ends: 1516 [2021-07-13 20:08:09,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:08:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-07-13 20:08:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1247. [2021-07-13 20:08:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.9839486356340288) internal successors, (2472), 1246 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2472 transitions. [2021-07-13 20:08:09,730 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2472 transitions. Word has length 36 [2021-07-13 20:08:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:09,730 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 2472 transitions. [2021-07-13 20:08:09,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2472 transitions. [2021-07-13 20:08:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 20:08:09,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:09,731 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:09,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:08:09,947 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash 211103962, now seen corresponding path program 52 times [2021-07-13 20:08:09,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:09,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304618248] [2021-07-13 20:08:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:10,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:10,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304618248] [2021-07-13 20:08:10,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304618248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:10,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580561328] [2021-07-13 20:08:10,141 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:10,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:10,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:10,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:10,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:10,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:10,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:10,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:08:10,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:10,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:10,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:10,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:08:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:10,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580561328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:10,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:10,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-07-13 20:08:10,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489067942] [2021-07-13 20:08:10,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:08:10,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:10,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:08:10,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:08:10,533 INFO L87 Difference]: Start difference. First operand 1247 states and 2472 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:11,133 INFO L93 Difference]: Finished difference Result 2817 states and 5721 transitions. [2021-07-13 20:08:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:08:11,133 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-13 20:08:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:11,136 INFO L225 Difference]: With dead ends: 2817 [2021-07-13 20:08:11,136 INFO L226 Difference]: Without dead ends: 2497 [2021-07-13 20:08:11,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 681.3ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-07-13 20:08:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1341. [2021-07-13 20:08:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.983582089552239) internal successors, (2658), 1340 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2658 transitions. [2021-07-13 20:08:11,151 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2658 transitions. Word has length 38 [2021-07-13 20:08:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:11,151 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 2658 transitions. [2021-07-13 20:08:11,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2658 transitions. [2021-07-13 20:08:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:11,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:11,153 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:11,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:08:11,368 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash -918345861, now seen corresponding path program 53 times [2021-07-13 20:08:11,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:11,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15416903] [2021-07-13 20:08:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:11,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:11,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15416903] [2021-07-13 20:08:11,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15416903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:11,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606147282] [2021-07-13 20:08:11,590 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:11,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:08:11,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:11,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:08:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:12,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:12,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:12,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:12,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:12,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-07-13 20:08:12,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:12,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:12,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:12,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-07-13 20:08:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:12,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606147282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:12,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:12,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:08:12,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000164289] [2021-07-13 20:08:12,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:08:12,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:12,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:08:12,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:08:12,275 INFO L87 Difference]: Start difference. First operand 1341 states and 2658 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 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) [2021-07-13 20:08:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:13,846 INFO L93 Difference]: Finished difference Result 2819 states and 5680 transitions. [2021-07-13 20:08:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:08:13,847 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 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 39 [2021-07-13 20:08:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:13,849 INFO L225 Difference]: With dead ends: 2819 [2021-07-13 20:08:13,850 INFO L226 Difference]: Without dead ends: 2609 [2021-07-13 20:08:13,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1563.6ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:08:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-07-13 20:08:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1437. [2021-07-13 20:08:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 1.9700557103064067) internal successors, (2829), 1436 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2829 transitions. [2021-07-13 20:08:13,867 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2829 transitions. Word has length 39 [2021-07-13 20:08:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:13,867 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 2829 transitions. [2021-07-13 20:08:13,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 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) [2021-07-13 20:08:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2829 transitions. [2021-07-13 20:08:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:13,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:13,869 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:14,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:14,085 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:14,086 INFO L82 PathProgramCache]: Analyzing trace with hash 456128011, now seen corresponding path program 54 times [2021-07-13 20:08:14,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:14,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777641335] [2021-07-13 20:08:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:14,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:14,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777641335] [2021-07-13 20:08:14,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777641335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:14,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261802246] [2021-07-13 20:08:14,301 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:14,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:08:14,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:14,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:14,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:14,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:14,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:14,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:14,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:14,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:14,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:14,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:14,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:14,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:14,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:14,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261802246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:14,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:14,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-07-13 20:08:14,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77111096] [2021-07-13 20:08:14,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:08:14,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:08:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:14,863 INFO L87 Difference]: Start difference. First operand 1437 states and 2829 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:15,230 INFO L93 Difference]: Finished difference Result 2311 states and 4610 transitions. [2021-07-13 20:08:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:15,233 INFO L225 Difference]: With dead ends: 2311 [2021-07-13 20:08:15,233 INFO L226 Difference]: Without dead ends: 2290 [2021-07-13 20:08:15,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 593.3ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-07-13 20:08:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1458. [2021-07-13 20:08:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 1.969114619080302) internal successors, (2869), 1457 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2869 transitions. [2021-07-13 20:08:15,253 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2869 transitions. Word has length 39 [2021-07-13 20:08:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:15,253 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 2869 transitions. [2021-07-13 20:08:15,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2869 transitions. [2021-07-13 20:08:15,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:15,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:15,255 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:15,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:08:15,471 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash -338168453, now seen corresponding path program 55 times [2021-07-13 20:08:15,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:15,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983354723] [2021-07-13 20:08:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:15,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983354723] [2021-07-13 20:08:15,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983354723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058078049] [2021-07-13 20:08:15,705 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:15,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:16,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:16,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:16,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:16,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:16,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:16,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:16,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:16,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:16,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:16,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:16,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058078049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:16,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:16,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-07-13 20:08:16,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529413900] [2021-07-13 20:08:16,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:16,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:16,333 INFO L87 Difference]: Start difference. First operand 1458 states and 2869 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:16,951 INFO L93 Difference]: Finished difference Result 2400 states and 4757 transitions. [2021-07-13 20:08:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:08:16,951 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:16,954 INFO L225 Difference]: With dead ends: 2400 [2021-07-13 20:08:16,954 INFO L226 Difference]: Without dead ends: 2109 [2021-07-13 20:08:16,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 852.2ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-07-13 20:08:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1497. [2021-07-13 20:08:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 1.9545454545454546) internal successors, (2924), 1496 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2924 transitions. [2021-07-13 20:08:16,972 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2924 transitions. Word has length 39 [2021-07-13 20:08:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:16,972 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 2924 transitions. [2021-07-13 20:08:16,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2924 transitions. [2021-07-13 20:08:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:16,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:16,974 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:17,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:17,189 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2077655787, now seen corresponding path program 56 times [2021-07-13 20:08:17,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:17,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634111006] [2021-07-13 20:08:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:17,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:17,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634111006] [2021-07-13 20:08:17,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634111006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:17,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009134382] [2021-07-13 20:08:17,446 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:17,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:17,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:17,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:17,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:18,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:18,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:18,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:18,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:18,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:18,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:18,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:18,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:18,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:18,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:18,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009134382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:18,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:18,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-07-13 20:08:18,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456540918] [2021-07-13 20:08:18,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:08:18,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:18,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:08:18,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:18,065 INFO L87 Difference]: Start difference. First operand 1497 states and 2924 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:18,406 INFO L93 Difference]: Finished difference Result 3106 states and 6326 transitions. [2021-07-13 20:08:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:18,406 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:18,409 INFO L225 Difference]: With dead ends: 3106 [2021-07-13 20:08:18,409 INFO L226 Difference]: Without dead ends: 2973 [2021-07-13 20:08:18,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-07-13 20:08:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1152. [2021-07-13 20:08:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.9791485664639443) internal successors, (2278), 1151 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2278 transitions. [2021-07-13 20:08:18,426 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2278 transitions. Word has length 39 [2021-07-13 20:08:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:18,426 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2278 transitions. [2021-07-13 20:08:18,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2278 transitions. [2021-07-13 20:08:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:18,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:18,428 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:18,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:08:18,644 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash -842837637, now seen corresponding path program 57 times [2021-07-13 20:08:18,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:18,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58201770] [2021-07-13 20:08:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:18,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:18,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58201770] [2021-07-13 20:08:18,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58201770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:18,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114004557] [2021-07-13 20:08:18,866 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:18,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:08:18,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:18,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:08:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:19,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:19,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:19,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:19,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:19,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:19,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:19,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114004557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:19,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:19,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-07-13 20:08:19,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28533237] [2021-07-13 20:08:19,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:08:19,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:19,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:08:19,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:19,443 INFO L87 Difference]: Start difference. First operand 1152 states and 2278 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:19,867 INFO L93 Difference]: Finished difference Result 2674 states and 5413 transitions. [2021-07-13 20:08:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:19,867 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:19,869 INFO L225 Difference]: With dead ends: 2674 [2021-07-13 20:08:19,869 INFO L226 Difference]: Without dead ends: 2391 [2021-07-13 20:08:19,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 606.8ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-13 20:08:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1314. [2021-07-13 20:08:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 1.9695354150799695) internal successors, (2586), 1313 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2586 transitions. [2021-07-13 20:08:19,885 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2586 transitions. Word has length 39 [2021-07-13 20:08:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:19,885 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 2586 transitions. [2021-07-13 20:08:19,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2586 transitions. [2021-07-13 20:08:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:19,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:19,886 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:20,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:20,089 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash -425263029, now seen corresponding path program 58 times [2021-07-13 20:08:20,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:20,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287102680] [2021-07-13 20:08:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:20,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287102680] [2021-07-13 20:08:20,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287102680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793646717] [2021-07-13 20:08:20,390 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:20,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:20,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:20,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:20,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:21,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:21,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:21,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:21,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:21,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:21,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:21,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:21,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793646717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:21,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:21,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-07-13 20:08:21,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185079379] [2021-07-13 20:08:21,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:21,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:21,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:21,093 INFO L87 Difference]: Start difference. First operand 1314 states and 2586 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:21,467 INFO L93 Difference]: Finished difference Result 2628 states and 5306 transitions. [2021-07-13 20:08:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:21,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:21,470 INFO L225 Difference]: With dead ends: 2628 [2021-07-13 20:08:21,470 INFO L226 Difference]: Without dead ends: 2562 [2021-07-13 20:08:21,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 801.5ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-07-13 20:08:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1257. [2021-07-13 20:08:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.9729299363057324) internal successors, (2478), 1256 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2478 transitions. [2021-07-13 20:08:21,487 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2478 transitions. Word has length 39 [2021-07-13 20:08:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:21,487 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 2478 transitions. [2021-07-13 20:08:21,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2478 transitions. [2021-07-13 20:08:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:21,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:21,488 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:21,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:08:21,704 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:21,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1562671547, now seen corresponding path program 59 times [2021-07-13 20:08:21,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:21,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099551782] [2021-07-13 20:08:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:21,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:21,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099551782] [2021-07-13 20:08:21,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099551782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:21,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908881393] [2021-07-13 20:08:21,977 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:22,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:08:22,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:22,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:08:22,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:22,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:22,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:22,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:22,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:22,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:22,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:22,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:22,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:22,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908881393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:22,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:22,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-07-13 20:08:22,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040450705] [2021-07-13 20:08:22,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:22,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:22,550 INFO L87 Difference]: Start difference. First operand 1257 states and 2478 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:22,974 INFO L93 Difference]: Finished difference Result 1841 states and 3650 transitions. [2021-07-13 20:08:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:08:22,975 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:22,977 INFO L225 Difference]: With dead ends: 1841 [2021-07-13 20:08:22,977 INFO L226 Difference]: Without dead ends: 1810 [2021-07-13 20:08:22,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 847.7ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:08:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-07-13 20:08:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1383. [2021-07-13 20:08:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.960202604920405) internal successors, (2709), 1382 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2709 transitions. [2021-07-13 20:08:23,002 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2709 transitions. Word has length 39 [2021-07-13 20:08:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:23,002 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 2709 transitions. [2021-07-13 20:08:23,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2709 transitions. [2021-07-13 20:08:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:23,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:23,004 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:23,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:23,221 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1491350523, now seen corresponding path program 60 times [2021-07-13 20:08:23,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:23,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582803605] [2021-07-13 20:08:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:08:23,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:23,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582803605] [2021-07-13 20:08:23,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582803605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:23,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24794871] [2021-07-13 20:08:23,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:23,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:08:23,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:23,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:23,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:24,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:24,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:24,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:24,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:24,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:24,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:24,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:24,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:24,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:24,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24794871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:24,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:24,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-07-13 20:08:24,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212689512] [2021-07-13 20:08:24,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:24,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:24,080 INFO L87 Difference]: Start difference. First operand 1383 states and 2709 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:24,757 INFO L93 Difference]: Finished difference Result 2027 states and 4033 transitions. [2021-07-13 20:08:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:08:24,757 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:24,760 INFO L225 Difference]: With dead ends: 2027 [2021-07-13 20:08:24,760 INFO L226 Difference]: Without dead ends: 1995 [2021-07-13 20:08:24,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 934.6ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:08:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-07-13 20:08:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1166. [2021-07-13 20:08:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 1.9630901287553648) internal successors, (2287), 1165 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2287 transitions. [2021-07-13 20:08:24,775 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2287 transitions. Word has length 39 [2021-07-13 20:08:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:24,775 INFO L482 AbstractCegarLoop]: Abstraction has 1166 states and 2287 transitions. [2021-07-13 20:08:24,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2287 transitions. [2021-07-13 20:08:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:24,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:24,777 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:24,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:08:24,985 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:24,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1844161605, now seen corresponding path program 61 times [2021-07-13 20:08:24,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:24,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063441346] [2021-07-13 20:08:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:25,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:25,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063441346] [2021-07-13 20:08:25,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063441346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:25,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489434209] [2021-07-13 20:08:25,253 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:25,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:25,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:25,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:25,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:25,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:25,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:25,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:25,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:25,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:25,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:25,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489434209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:25,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:25,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-07-13 20:08:25,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679012268] [2021-07-13 20:08:25,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:25,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:25,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:25,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:25,896 INFO L87 Difference]: Start difference. First operand 1166 states and 2287 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:26,527 INFO L93 Difference]: Finished difference Result 1981 states and 3920 transitions. [2021-07-13 20:08:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:26,530 INFO L225 Difference]: With dead ends: 1981 [2021-07-13 20:08:26,530 INFO L226 Difference]: Without dead ends: 1696 [2021-07-13 20:08:26,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 860.1ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:08:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-07-13 20:08:26,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1224. [2021-07-13 20:08:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9574816026165167) internal successors, (2394), 1223 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2394 transitions. [2021-07-13 20:08:26,543 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2394 transitions. Word has length 39 [2021-07-13 20:08:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:26,543 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2394 transitions. [2021-07-13 20:08:26,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2394 transitions. [2021-07-13 20:08:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:26,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:26,544 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:26,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:26,760 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1946136507, now seen corresponding path program 62 times [2021-07-13 20:08:26,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:26,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924028205] [2021-07-13 20:08:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:27,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924028205] [2021-07-13 20:08:27,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924028205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025822011] [2021-07-13 20:08:27,063 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:27,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:27,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:27,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:27,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:27,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:27,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:27,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:27,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:27,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:27,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:27,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:27,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:27,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025822011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:27,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-07-13 20:08:27,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570823160] [2021-07-13 20:08:27,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:27,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:27,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:27,651 INFO L87 Difference]: Start difference. First operand 1224 states and 2394 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:27,986 INFO L93 Difference]: Finished difference Result 2349 states and 4815 transitions. [2021-07-13 20:08:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:08:27,986 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:27,989 INFO L225 Difference]: With dead ends: 2349 [2021-07-13 20:08:27,989 INFO L226 Difference]: Without dead ends: 2230 [2021-07-13 20:08:27,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 687.6ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-07-13 20:08:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1230. [2021-07-13 20:08:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.9576891781936534) internal successors, (2406), 1229 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2406 transitions. [2021-07-13 20:08:28,003 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2406 transitions. Word has length 39 [2021-07-13 20:08:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:28,003 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 2406 transitions. [2021-07-13 20:08:28,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2406 transitions. [2021-07-13 20:08:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:28,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:28,004 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:28,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:08:28,217 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1339514507, now seen corresponding path program 63 times [2021-07-13 20:08:28,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:28,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383350901] [2021-07-13 20:08:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:28,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:28,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383350901] [2021-07-13 20:08:28,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383350901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:28,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559635731] [2021-07-13 20:08:28,448 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:28,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:08:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:28,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:28,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:28,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:28,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:29,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:29,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:29,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:29,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:29,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:29,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:29,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:29,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559635731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:29,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:29,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-07-13 20:08:29,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355582501] [2021-07-13 20:08:29,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:29,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:29,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:29,028 INFO L87 Difference]: Start difference. First operand 1230 states and 2406 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:29,347 INFO L93 Difference]: Finished difference Result 2175 states and 4323 transitions. [2021-07-13 20:08:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:08:29,347 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:29,349 INFO L225 Difference]: With dead ends: 2175 [2021-07-13 20:08:29,349 INFO L226 Difference]: Without dead ends: 1948 [2021-07-13 20:08:29,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 706.4ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-07-13 20:08:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1359. [2021-07-13 20:08:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 1.9499263622974963) internal successors, (2648), 1358 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2648 transitions. [2021-07-13 20:08:29,362 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2648 transitions. Word has length 39 [2021-07-13 20:08:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:29,362 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 2648 transitions. [2021-07-13 20:08:29,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2648 transitions. [2021-07-13 20:08:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:29,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:29,364 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:29,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:08:29,580 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:29,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1830892405, now seen corresponding path program 64 times [2021-07-13 20:08:29,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:29,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508405952] [2021-07-13 20:08:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:29,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:29,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508405952] [2021-07-13 20:08:29,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508405952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:29,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569834241] [2021-07-13 20:08:29,811 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:29,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:29,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:29,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:29,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:30,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:30,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:30,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:30,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:30,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:30,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569834241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:30,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:30,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-07-13 20:08:30,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185450092] [2021-07-13 20:08:30,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:08:30,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:08:30,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:30,397 INFO L87 Difference]: Start difference. First operand 1359 states and 2648 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:30,657 INFO L93 Difference]: Finished difference Result 2695 states and 5412 transitions. [2021-07-13 20:08:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:08:30,657 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:30,660 INFO L225 Difference]: With dead ends: 2695 [2021-07-13 20:08:30,660 INFO L226 Difference]: Without dead ends: 2635 [2021-07-13 20:08:30,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-07-13 20:08:30,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1326. [2021-07-13 20:08:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.9449056603773585) internal successors, (2577), 1325 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2577 transitions. [2021-07-13 20:08:30,675 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2577 transitions. Word has length 39 [2021-07-13 20:08:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:30,675 INFO L482 AbstractCegarLoop]: Abstraction has 1326 states and 2577 transitions. [2021-07-13 20:08:30,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2577 transitions. [2021-07-13 20:08:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:30,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:30,676 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:30,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:08:30,892 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash 834845323, now seen corresponding path program 65 times [2021-07-13 20:08:30,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:30,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230571988] [2021-07-13 20:08:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:31,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:31,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230571988] [2021-07-13 20:08:31,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230571988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813675243] [2021-07-13 20:08:31,148 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:31,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:08:31,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:31,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:08:31,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:31,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:31,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:31,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:134, output treesize:7 [2021-07-13 20:08:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:31,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813675243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:31,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-07-13 20:08:31,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221281044] [2021-07-13 20:08:31,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:08:31,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:31,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:08:31,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:31,788 INFO L87 Difference]: Start difference. First operand 1326 states and 2577 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:32,097 INFO L93 Difference]: Finished difference Result 2530 states and 5090 transitions. [2021-07-13 20:08:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:08:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:32,104 INFO L225 Difference]: With dead ends: 2530 [2021-07-13 20:08:32,104 INFO L226 Difference]: Without dead ends: 2290 [2021-07-13 20:08:32,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 668.4ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-07-13 20:08:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1371. [2021-07-13 20:08:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.9445255474452554) internal successors, (2664), 1370 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2664 transitions. [2021-07-13 20:08:32,120 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2664 transitions. Word has length 39 [2021-07-13 20:08:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:32,121 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 2664 transitions. [2021-07-13 20:08:32,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2664 transitions. [2021-07-13 20:08:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:32,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:32,122 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:32,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:32,337 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash 493862395, now seen corresponding path program 66 times [2021-07-13 20:08:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:32,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386392682] [2021-07-13 20:08:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:32,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:32,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386392682] [2021-07-13 20:08:32,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386392682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:32,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339447272] [2021-07-13 20:08:32,646 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:32,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:08:32,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:32,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:33,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:33,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:33,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:33,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:33,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:33,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339447272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:33,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-07-13 20:08:33,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545232264] [2021-07-13 20:08:33,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:33,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:33,257 INFO L87 Difference]: Start difference. First operand 1371 states and 2664 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:33,677 INFO L93 Difference]: Finished difference Result 1989 states and 3938 transitions. [2021-07-13 20:08:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:08:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:33,680 INFO L225 Difference]: With dead ends: 1989 [2021-07-13 20:08:33,680 INFO L226 Difference]: Without dead ends: 1967 [2021-07-13 20:08:33,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 671.0ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-07-13 20:08:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1374. [2021-07-13 20:08:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 1.9446467589220684) internal successors, (2670), 1373 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2670 transitions. [2021-07-13 20:08:33,697 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2670 transitions. Word has length 39 [2021-07-13 20:08:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:33,697 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 2670 transitions. [2021-07-13 20:08:33,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2670 transitions. [2021-07-13 20:08:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:33,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:33,699 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:33,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:33,916 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1724860693, now seen corresponding path program 67 times [2021-07-13 20:08:33,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:33,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734568454] [2021-07-13 20:08:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:34,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:34,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734568454] [2021-07-13 20:08:34,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734568454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:34,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970839678] [2021-07-13 20:08:34,236 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:34,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:34,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:34,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:34,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:34,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:34,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:34,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:34,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970839678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:34,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:34,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-07-13 20:08:34,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144271873] [2021-07-13 20:08:34,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:08:34,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:34,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:08:34,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:34,834 INFO L87 Difference]: Start difference. First operand 1374 states and 2670 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:35,203 INFO L93 Difference]: Finished difference Result 3158 states and 6442 transitions. [2021-07-13 20:08:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:08:35,203 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:35,206 INFO L225 Difference]: With dead ends: 3158 [2021-07-13 20:08:35,206 INFO L226 Difference]: Without dead ends: 3018 [2021-07-13 20:08:35,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-07-13 20:08:35,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 795. [2021-07-13 20:08:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.013853904282116) internal successors, (1599), 794 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1599 transitions. [2021-07-13 20:08:35,221 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1599 transitions. Word has length 39 [2021-07-13 20:08:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:35,221 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1599 transitions. [2021-07-13 20:08:35,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1599 transitions. [2021-07-13 20:08:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:35,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:35,222 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:35,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:35,439 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:35,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1458815419, now seen corresponding path program 68 times [2021-07-13 20:08:35,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:35,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982597668] [2021-07-13 20:08:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:35,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:35,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982597668] [2021-07-13 20:08:35,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982597668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:35,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648219378] [2021-07-13 20:08:35,658 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:35,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:35,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:35,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:35,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:36,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:36,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:36,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:36,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:36,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:36,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:36,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:36,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:36,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648219378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:36,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:36,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-07-13 20:08:36,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003119646] [2021-07-13 20:08:36,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:08:36,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:36,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:08:36,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:36,119 INFO L87 Difference]: Start difference. First operand 795 states and 1599 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:36,545 INFO L93 Difference]: Finished difference Result 2070 states and 4261 transitions. [2021-07-13 20:08:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:08:36,546 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:36,548 INFO L225 Difference]: With dead ends: 2070 [2021-07-13 20:08:36,548 INFO L226 Difference]: Without dead ends: 2009 [2021-07-13 20:08:36,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-07-13 20:08:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 786. [2021-07-13 20:08:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.0140127388535034) internal successors, (1581), 785 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) [2021-07-13 20:08:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1581 transitions. [2021-07-13 20:08:36,561 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1581 transitions. Word has length 39 [2021-07-13 20:08:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:36,561 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1581 transitions. [2021-07-13 20:08:36,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1581 transitions. [2021-07-13 20:08:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:36,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:36,562 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:36,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 20:08:36,780 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1117832491, now seen corresponding path program 69 times [2021-07-13 20:08:36,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:36,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187661106] [2021-07-13 20:08:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:37,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:37,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187661106] [2021-07-13 20:08:37,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187661106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330084491] [2021-07-13 20:08:37,035 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:37,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:08:37,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:37,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:37,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:37,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:37,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:37,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:37,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:37,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:37,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:37,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:37,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330084491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:37,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:37,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-07-13 20:08:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137087868] [2021-07-13 20:08:37,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:08:37,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:37,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:08:37,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:37,586 INFO L87 Difference]: Start difference. First operand 786 states and 1581 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:38,403 INFO L93 Difference]: Finished difference Result 1866 states and 3843 transitions. [2021-07-13 20:08:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:08:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:08:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:38,407 INFO L225 Difference]: With dead ends: 1866 [2021-07-13 20:08:38,407 INFO L226 Difference]: Without dead ends: 1802 [2021-07-13 20:08:38,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-07-13 20:08:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 792. [2021-07-13 20:08:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 2.013906447534766) internal successors, (1593), 791 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1593 transitions. [2021-07-13 20:08:38,417 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1593 transitions. Word has length 39 [2021-07-13 20:08:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:38,417 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 1593 transitions. [2021-07-13 20:08:38,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1593 transitions. [2021-07-13 20:08:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:38,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:38,418 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:38,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:38,619 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash 350255179, now seen corresponding path program 70 times [2021-07-13 20:08:38,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:38,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187519576] [2021-07-13 20:08:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:38,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:38,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187519576] [2021-07-13 20:08:38,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187519576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:38,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586899581] [2021-07-13 20:08:38,997 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:39,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:39,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:39,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:39,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:39,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:39,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:39,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:39,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:39,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:08:39,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:39,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:39,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:39,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:08:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:39,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586899581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:39,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:39,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-07-13 20:08:39,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112257383] [2021-07-13 20:08:39,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:08:39,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:08:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:08:39,496 INFO L87 Difference]: Start difference. First operand 792 states and 1593 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-13 20:08:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:40,090 INFO L93 Difference]: Finished difference Result 1711 states and 3435 transitions. [2021-07-13 20:08:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:08:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 39 [2021-07-13 20:08:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:40,093 INFO L225 Difference]: With dead ends: 1711 [2021-07-13 20:08:40,093 INFO L226 Difference]: Without dead ends: 1381 [2021-07-13 20:08:40,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 870.5ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-07-13 20:08:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 885. [2021-07-13 20:08:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.005656108597285) internal successors, (1773), 884 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1773 transitions. [2021-07-13 20:08:40,101 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1773 transitions. Word has length 39 [2021-07-13 20:08:40,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:40,102 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1773 transitions. [2021-07-13 20:08:40,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-13 20:08:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1773 transitions. [2021-07-13 20:08:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:40,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:40,103 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:40,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:40,319 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:40,319 INFO L82 PathProgramCache]: Analyzing trace with hash -154414005, now seen corresponding path program 71 times [2021-07-13 20:08:40,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:40,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91450375] [2021-07-13 20:08:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:40,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:40,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91450375] [2021-07-13 20:08:40,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91450375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:40,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461737165] [2021-07-13 20:08:40,581 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:40,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:08:40,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:40,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-13 20:08:40,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:47,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:47,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:47,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:47,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:47,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:47,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 38 [2021-07-13 20:08:47,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:47,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:47,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:47,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:3 [2021-07-13 20:08:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:47,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461737165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:47,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:47,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:08:47,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068679467] [2021-07-13 20:08:47,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:08:47,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:47,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:08:47,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=961, Unknown=2, NotChecked=0, Total=1056 [2021-07-13 20:08:47,525 INFO L87 Difference]: Start difference. First operand 885 states and 1773 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 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) [2021-07-13 20:09:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:43,425 INFO L93 Difference]: Finished difference Result 2776 states and 5550 transitions. [2021-07-13 20:09:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:09:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 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 39 [2021-07-13 20:09:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:43,429 INFO L225 Difference]: With dead ends: 2776 [2021-07-13 20:09:43,429 INFO L226 Difference]: Without dead ends: 2481 [2021-07-13 20:09:43,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 32929.0ms TimeCoverageRelationStatistics Valid=392, Invalid=5300, Unknown=8, NotChecked=0, Total=5700 [2021-07-13 20:09:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-07-13 20:09:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1028. [2021-07-13 20:09:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.0136319376825704) internal successors, (2068), 1027 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2068 transitions. [2021-07-13 20:09:43,443 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2068 transitions. Word has length 39 [2021-07-13 20:09:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:43,443 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 2068 transitions. [2021-07-13 20:09:43,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 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) [2021-07-13 20:09:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2068 transitions. [2021-07-13 20:09:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:43,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:43,444 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:43,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:43,660 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash -495396933, now seen corresponding path program 72 times [2021-07-13 20:09:43,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:43,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732391292] [2021-07-13 20:09:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:43,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:43,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732391292] [2021-07-13 20:09:43,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732391292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:43,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003506931] [2021-07-13 20:09:43,955 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:43,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:09:43,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:43,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:44,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:44,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:44,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:44,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:44,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:44,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003506931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:44,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:44,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-07-13 20:09:44,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712668820] [2021-07-13 20:09:44,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:44,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:44,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:44,501 INFO L87 Difference]: Start difference. First operand 1028 states and 2068 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2021-07-13 20:09:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:44,806 INFO L93 Difference]: Finished difference Result 1646 states and 3342 transitions. [2021-07-13 20:09:44,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:09:44,806 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 39 [2021-07-13 20:09:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:44,808 INFO L225 Difference]: With dead ends: 1646 [2021-07-13 20:09:44,808 INFO L226 Difference]: Without dead ends: 1624 [2021-07-13 20:09:44,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 662.4ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:09:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-07-13 20:09:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1031. [2021-07-13 20:09:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.013592233009709) internal successors, (2074), 1030 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2074 transitions. [2021-07-13 20:09:44,819 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2074 transitions. Word has length 39 [2021-07-13 20:09:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:44,819 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 2074 transitions. [2021-07-13 20:09:44,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2021-07-13 20:09:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2074 transitions. [2021-07-13 20:09:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:44,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:44,821 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:45,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 20:09:45,037 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:45,037 INFO L82 PathProgramCache]: Analyzing trace with hash -435485973, now seen corresponding path program 73 times [2021-07-13 20:09:45,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:45,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878408872] [2021-07-13 20:09:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:45,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:45,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878408872] [2021-07-13 20:09:45,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878408872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:45,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896049431] [2021-07-13 20:09:45,319 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:45,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:45,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:45,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:45,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:45,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:45,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:45,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:45,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896049431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:45,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:45,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-07-13 20:09:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195676727] [2021-07-13 20:09:45,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:09:45,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:09:45,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:09:45,856 INFO L87 Difference]: Start difference. First operand 1031 states and 2074 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-07-13 20:09:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:46,250 INFO L93 Difference]: Finished difference Result 2173 states and 4427 transitions. [2021-07-13 20:09:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:09:46,250 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 39 [2021-07-13 20:09:46,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:46,253 INFO L225 Difference]: With dead ends: 2173 [2021-07-13 20:09:46,253 INFO L226 Difference]: Without dead ends: 2130 [2021-07-13 20:09:46,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 651.5ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-07-13 20:09:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1070. [2021-07-13 20:09:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 2.0130963517305895) internal successors, (2152), 1069 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 2152 transitions. [2021-07-13 20:09:46,265 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 2152 transitions. Word has length 39 [2021-07-13 20:09:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:46,265 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 2152 transitions. [2021-07-13 20:09:46,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-07-13 20:09:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 2152 transitions. [2021-07-13 20:09:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:46,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:46,266 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:46,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:46,483 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:46,483 INFO L82 PathProgramCache]: Analyzing trace with hash -327707125, now seen corresponding path program 74 times [2021-07-13 20:09:46,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:46,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333113264] [2021-07-13 20:09:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:46,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:46,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333113264] [2021-07-13 20:09:46,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333113264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:46,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368979454] [2021-07-13 20:09:46,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:46,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:46,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:46,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:46,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:47,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:47,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:47,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:47,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:47,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:47,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:47,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:47,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368979454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:47,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:47,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-07-13 20:09:47,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847705958] [2021-07-13 20:09:47,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:09:47,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:47,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:09:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:09:47,170 INFO L87 Difference]: Start difference. First operand 1070 states and 2152 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:47,822 INFO L93 Difference]: Finished difference Result 1889 states and 3781 transitions. [2021-07-13 20:09:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:09:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:09:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:47,824 INFO L225 Difference]: With dead ends: 1889 [2021-07-13 20:09:47,824 INFO L226 Difference]: Without dead ends: 1614 [2021-07-13 20:09:47,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 873.1ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-13 20:09:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1130. [2021-07-13 20:09:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.008857395925598) internal successors, (2268), 1129 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2268 transitions. [2021-07-13 20:09:47,835 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2268 transitions. Word has length 39 [2021-07-13 20:09:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:47,835 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 2268 transitions. [2021-07-13 20:09:47,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2268 transitions. [2021-07-13 20:09:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:47,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:47,836 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:48,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:09:48,052 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash -853246965, now seen corresponding path program 75 times [2021-07-13 20:09:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:48,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317830833] [2021-07-13 20:09:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:48,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:48,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317830833] [2021-07-13 20:09:48,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317830833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:48,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285698756] [2021-07-13 20:09:48,295 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:48,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:09:48,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:48,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:09:48,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:48,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:48,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:48,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-07-13 20:09:48,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:48,948 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:09:48,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:48,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-07-13 20:09:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:48,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285698756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:48,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:48,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-07-13 20:09:48,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327260656] [2021-07-13 20:09:48,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:09:48,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:48,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:09:48,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:09:48,960 INFO L87 Difference]: Start difference. First operand 1130 states and 2268 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:50,272 INFO L93 Difference]: Finished difference Result 2002 states and 3962 transitions. [2021-07-13 20:09:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:09:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:09:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:50,274 INFO L225 Difference]: With dead ends: 2002 [2021-07-13 20:09:50,274 INFO L226 Difference]: Without dead ends: 1688 [2021-07-13 20:09:50,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1372.0ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:09:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-07-13 20:09:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1157. [2021-07-13 20:09:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.0051903114186853) internal successors, (2318), 1156 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2318 transitions. [2021-07-13 20:09:50,286 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2318 transitions. Word has length 39 [2021-07-13 20:09:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:50,286 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2318 transitions. [2021-07-13 20:09:50,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2318 transitions. [2021-07-13 20:09:50,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:50,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:50,287 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:50,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:50,505 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:50,505 INFO L82 PathProgramCache]: Analyzing trace with hash 909107723, now seen corresponding path program 76 times [2021-07-13 20:09:50,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:50,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271021378] [2021-07-13 20:09:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:50,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:50,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271021378] [2021-07-13 20:09:50,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271021378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:50,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116740332] [2021-07-13 20:09:50,762 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:50,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:50,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:50,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:50,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:51,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:51,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:51,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:51,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:51,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:51,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116740332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:51,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:51,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-07-13 20:09:51,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698716925] [2021-07-13 20:09:51,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:09:51,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:51,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:09:51,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:09:51,218 INFO L87 Difference]: Start difference. First operand 1157 states and 2318 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:51,851 INFO L93 Difference]: Finished difference Result 2390 states and 4766 transitions. [2021-07-13 20:09:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:09:51,852 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:09:51,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:51,854 INFO L225 Difference]: With dead ends: 2390 [2021-07-13 20:09:51,854 INFO L226 Difference]: Without dead ends: 2089 [2021-07-13 20:09:51,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 862.9ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-07-13 20:09:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1493. [2021-07-13 20:09:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 1.9845844504021448) internal successors, (2961), 1492 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2961 transitions. [2021-07-13 20:09:51,869 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2961 transitions. Word has length 39 [2021-07-13 20:09:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:51,869 INFO L482 AbstractCegarLoop]: Abstraction has 1493 states and 2961 transitions. [2021-07-13 20:09:51,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2961 transitions. [2021-07-13 20:09:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:51,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:51,871 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:52,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:52,087 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:52,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:52,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1471668869, now seen corresponding path program 77 times [2021-07-13 20:09:52,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:52,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318586567] [2021-07-13 20:09:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:52,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:52,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318586567] [2021-07-13 20:09:52,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318586567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:52,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305511443] [2021-07-13 20:09:52,328 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:52,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:09:52,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:52,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:52,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 48 [2021-07-13 20:09:53,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:53,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:135, output treesize:7 [2021-07-13 20:09:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:53,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305511443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:53,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-13 20:09:53,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566962828] [2021-07-13 20:09:53,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:09:53,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:53,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:09:53,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:09:53,139 INFO L87 Difference]: Start difference. First operand 1493 states and 2961 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:55,674 INFO L93 Difference]: Finished difference Result 3509 states and 6960 transitions. [2021-07-13 20:09:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:09:55,674 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:09:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:55,678 INFO L225 Difference]: With dead ends: 3509 [2021-07-13 20:09:55,678 INFO L226 Difference]: Without dead ends: 3088 [2021-07-13 20:09:55,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2182.9ms TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:09:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-07-13 20:09:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1542. [2021-07-13 20:09:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.9798831927319922) internal successors, (3051), 1541 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 3051 transitions. [2021-07-13 20:09:55,697 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 3051 transitions. Word has length 39 [2021-07-13 20:09:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:55,697 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 3051 transitions. [2021-07-13 20:09:55,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 3051 transitions. [2021-07-13 20:09:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:55,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:55,699 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:55,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:55,915 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:55,915 INFO L82 PathProgramCache]: Analyzing trace with hash 63455611, now seen corresponding path program 78 times [2021-07-13 20:09:55,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:55,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32271095] [2021-07-13 20:09:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:56,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:56,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32271095] [2021-07-13 20:09:56,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32271095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:56,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61702391] [2021-07-13 20:09:56,233 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:56,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:09:56,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:56,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:56,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:56,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:56,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:56,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:56,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:56,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:56,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:56,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61702391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:56,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:56,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-07-13 20:09:56,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161028706] [2021-07-13 20:09:56,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:09:56,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:09:56,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:09:56,671 INFO L87 Difference]: Start difference. First operand 1542 states and 3051 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:56,981 INFO L93 Difference]: Finished difference Result 2925 states and 5994 transitions. [2021-07-13 20:09:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:09:56,981 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:09:56,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:56,984 INFO L225 Difference]: With dead ends: 2925 [2021-07-13 20:09:56,984 INFO L226 Difference]: Without dead ends: 2803 [2021-07-13 20:09:56,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:09:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-07-13 20:09:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 1557. [2021-07-13 20:09:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 1.9800771208226222) internal successors, (3081), 1556 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 3081 transitions. [2021-07-13 20:09:57,006 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 3081 transitions. Word has length 39 [2021-07-13 20:09:57,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:57,006 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 3081 transitions. [2021-07-13 20:09:57,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 3081 transitions. [2021-07-13 20:09:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:57,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:57,008 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:57,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:57,225 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash 818819387, now seen corresponding path program 79 times [2021-07-13 20:09:57,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:57,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608207388] [2021-07-13 20:09:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:57,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:57,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608207388] [2021-07-13 20:09:57,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608207388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:57,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246444541] [2021-07-13 20:09:57,515 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:57,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:57,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:57,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:57,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:57,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:57,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:57,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:57,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:57,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246444541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:57,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:57,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-07-13 20:09:57,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650950250] [2021-07-13 20:09:57,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:09:57,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:57,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:09:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:09:57,977 INFO L87 Difference]: Start difference. First operand 1557 states and 3081 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:58,736 INFO L93 Difference]: Finished difference Result 2411 states and 4790 transitions. [2021-07-13 20:09:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:09:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:09:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:58,738 INFO L225 Difference]: With dead ends: 2411 [2021-07-13 20:09:58,738 INFO L226 Difference]: Without dead ends: 2119 [2021-07-13 20:09:58,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 962.0ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-07-13 20:09:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1674. [2021-07-13 20:09:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.9796772265391511) internal successors, (3312), 1673 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3312 transitions. [2021-07-13 20:09:58,756 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3312 transitions. Word has length 39 [2021-07-13 20:09:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:58,756 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 3312 transitions. [2021-07-13 20:09:58,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3312 transitions. [2021-07-13 20:09:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:58,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:58,757 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:58,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:58,974 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:58,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1561957205, now seen corresponding path program 80 times [2021-07-13 20:09:58,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:58,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890984806] [2021-07-13 20:09:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:59,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:59,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890984806] [2021-07-13 20:09:59,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890984806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:59,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993247442] [2021-07-13 20:09:59,190 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:59,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:59,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:59,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:59,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:59,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:59,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:59,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993247442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:59,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:59,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-07-13 20:09:59,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991735561] [2021-07-13 20:09:59,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:09:59,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:59,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:09:59,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:09:59,649 INFO L87 Difference]: Start difference. First operand 1674 states and 3312 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:59,889 INFO L93 Difference]: Finished difference Result 2847 states and 5742 transitions. [2021-07-13 20:09:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:09:59,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:09:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:59,892 INFO L225 Difference]: With dead ends: 2847 [2021-07-13 20:09:59,892 INFO L226 Difference]: Without dead ends: 2791 [2021-07-13 20:09:59,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 502.6ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:09:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-07-13 20:09:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1659. [2021-07-13 20:09:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 1.9782870928829916) internal successors, (3280), 1658 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3280 transitions. [2021-07-13 20:09:59,911 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3280 transitions. Word has length 39 [2021-07-13 20:09:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:59,911 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3280 transitions. [2021-07-13 20:09:59,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:59,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3280 transitions. [2021-07-13 20:09:59,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:59,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:59,913 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:00,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:00,129 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1060323669, now seen corresponding path program 81 times [2021-07-13 20:10:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:00,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065690882] [2021-07-13 20:10:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:00,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:00,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065690882] [2021-07-13 20:10:00,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065690882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:00,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059402450] [2021-07-13 20:10:00,424 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:00,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:10:00,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:00,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:00,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:01,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:01,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:01,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:01,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:01,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-07-13 20:10:01,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:01,139 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:10:01,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:01,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-07-13 20:10:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:01,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059402450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:01,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:01,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-07-13 20:10:01,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988765006] [2021-07-13 20:10:01,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:10:01,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:10:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:10:01,149 INFO L87 Difference]: Start difference. First operand 1659 states and 3280 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) [2021-07-13 20:10:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:02,510 INFO L93 Difference]: Finished difference Result 3263 states and 6548 transitions. [2021-07-13 20:10:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:10:02,511 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 39 [2021-07-13 20:10:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:02,515 INFO L225 Difference]: With dead ends: 3263 [2021-07-13 20:10:02,515 INFO L226 Difference]: Without dead ends: 3144 [2021-07-13 20:10:02,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1425.0ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:10:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-07-13 20:10:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 1719. [2021-07-13 20:10:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-07-13 20:10:02,541 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-07-13 20:10:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:02,541 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-07-13 20:10:02,541 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) [2021-07-13 20:10:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-07-13 20:10:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:10:02,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:02,544 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:02,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:02,757 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash -26832725, now seen corresponding path program 82 times [2021-07-13 20:10:02,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:02,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948622045] [2021-07-13 20:10:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:03,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:03,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948622045] [2021-07-13 20:10:03,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948622045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:03,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43623778] [2021-07-13 20:10:03,027 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:03,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:03,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:03,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:10:03,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:03,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:03,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:03,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:03,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:03,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:03,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:03,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43623778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:03,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:03,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-07-13 20:10:03,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196076851] [2021-07-13 20:10:03,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:10:03,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:03,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:10:03,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:10:03,488 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:03,758 INFO L93 Difference]: Finished difference Result 3005 states and 6062 transitions. [2021-07-13 20:10:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:10:03,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:10:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:03,762 INFO L225 Difference]: With dead ends: 3005 [2021-07-13 20:10:03,762 INFO L226 Difference]: Without dead ends: 2947 [2021-07-13 20:10:03,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 574.9ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:10:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-07-13 20:10:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1719. [2021-07-13 20:10:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-07-13 20:10:03,780 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-07-13 20:10:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:03,780 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-07-13 20:10:03,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-07-13 20:10:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:10:03,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:03,782 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:03,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:10:03,993 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2007368901, now seen corresponding path program 83 times [2021-07-13 20:10:03,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:03,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489401465] [2021-07-13 20:10:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:04,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:04,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489401465] [2021-07-13 20:10:04,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489401465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:04,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700625195] [2021-07-13 20:10:04,297 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:04,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:10:04,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:04,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:10:04,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:04,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:04,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:04,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700625195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:04,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:04,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-07-13 20:10:04,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964860020] [2021-07-13 20:10:04,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:10:04,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:04,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:10:04,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:10:04,818 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:05,147 INFO L93 Difference]: Finished difference Result 2585 states and 5147 transitions. [2021-07-13 20:10:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:10:05,147 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:10:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:05,150 INFO L225 Difference]: With dead ends: 2585 [2021-07-13 20:10:05,150 INFO L226 Difference]: Without dead ends: 2553 [2021-07-13 20:10:05,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:10:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-07-13 20:10:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1750. [2021-07-13 20:10:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 1.979416809605489) internal successors, (3462), 1749 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3462 transitions. [2021-07-13 20:10:05,166 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3462 transitions. Word has length 39 [2021-07-13 20:10:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:05,166 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 3462 transitions. [2021-07-13 20:10:05,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3462 transitions. [2021-07-13 20:10:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:10:05,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:05,168 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:05,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:05,381 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1770592930, now seen corresponding path program 84 times [2021-07-13 20:10:05,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:05,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728593245] [2021-07-13 20:10:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:05,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:05,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728593245] [2021-07-13 20:10:05,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728593245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:05,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596370042] [2021-07-13 20:10:05,647 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:05,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:10:05,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:05,685 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:10:05,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:06,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:06,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:06,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:06,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:06,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:06,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:06,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596370042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:06,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:06,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 24 [2021-07-13 20:10:06,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520671393] [2021-07-13 20:10:06,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:10:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:10:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:10:06,076 INFO L87 Difference]: Start difference. First operand 1750 states and 3462 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2021-07-13 20:10:07,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:07,241 INFO L93 Difference]: Finished difference Result 3417 states and 6971 transitions. [2021-07-13 20:10:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:10:07,241 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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 42 [2021-07-13 20:10:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:07,245 INFO L225 Difference]: With dead ends: 3417 [2021-07-13 20:10:07,245 INFO L226 Difference]: Without dead ends: 3297 [2021-07-13 20:10:07,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1247.4ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:10:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2021-07-13 20:10:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 1765. [2021-07-13 20:10:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 1.9795918367346939) internal successors, (3492), 1764 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 3492 transitions. [2021-07-13 20:10:07,270 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 3492 transitions. Word has length 42 [2021-07-13 20:10:07,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:07,270 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 3492 transitions. [2021-07-13 20:10:07,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2021-07-13 20:10:07,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 3492 transitions. [2021-07-13 20:10:07,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:07,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:07,273 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:07,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 20:10:07,489 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:07,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:07,489 INFO L82 PathProgramCache]: Analyzing trace with hash -726200285, now seen corresponding path program 85 times [2021-07-13 20:10:07,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:07,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206776679] [2021-07-13 20:10:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:07,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:07,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206776679] [2021-07-13 20:10:07,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206776679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:07,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978883343] [2021-07-13 20:10:07,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:07,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:10:07,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:08,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:08,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:08,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:08,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:08,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:08,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:08,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:08,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:10:08,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:08,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:08,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:08,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:10:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:08,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978883343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:08,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:08,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-07-13 20:10:08,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058178709] [2021-07-13 20:10:08,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:10:08,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:08,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:10:08,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:10:08,586 INFO L87 Difference]: Start difference. First operand 1765 states and 3492 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:09,215 INFO L93 Difference]: Finished difference Result 4013 states and 8194 transitions. [2021-07-13 20:10:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:10:09,215 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:09,220 INFO L225 Difference]: With dead ends: 4013 [2021-07-13 20:10:09,220 INFO L226 Difference]: Without dead ends: 3851 [2021-07-13 20:10:09,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 818.7ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:10:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-07-13 20:10:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 1882. [2021-07-13 20:10:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 1.977671451355662) internal successors, (3720), 1881 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3720 transitions. [2021-07-13 20:10:09,248 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3720 transitions. Word has length 43 [2021-07-13 20:10:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:09,248 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 3720 transitions. [2021-07-13 20:10:09,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3720 transitions. [2021-07-13 20:10:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:09,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:09,250 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:09,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:09,461 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash 733771603, now seen corresponding path program 86 times [2021-07-13 20:10:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:09,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410264408] [2021-07-13 20:10:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:09,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410264408] [2021-07-13 20:10:09,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410264408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183331171] [2021-07-13 20:10:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:09,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:09,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:09,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:10:09,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:10,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:10,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:10,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:10,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:10,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:10,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:10:10,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:10,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:10:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:10,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183331171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:10,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:10,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-07-13 20:10:10,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545122723] [2021-07-13 20:10:10,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:10:10,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:10:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:10:10,532 INFO L87 Difference]: Start difference. First operand 1882 states and 3720 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:10,990 INFO L93 Difference]: Finished difference Result 3614 states and 7238 transitions. [2021-07-13 20:10:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:10:10,991 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:10,994 INFO L225 Difference]: With dead ends: 3614 [2021-07-13 20:10:10,994 INFO L226 Difference]: Without dead ends: 3586 [2021-07-13 20:10:10,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 842.4ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:10:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-07-13 20:10:11,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 1927. [2021-07-13 20:10:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 1.9792315680166148) internal successors, (3812), 1926 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 3812 transitions. [2021-07-13 20:10:11,016 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 3812 transitions. Word has length 43 [2021-07-13 20:10:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:11,017 INFO L482 AbstractCegarLoop]: Abstraction has 1927 states and 3812 transitions. [2021-07-13 20:10:11,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 3812 transitions. [2021-07-13 20:10:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:11,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:11,019 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:11,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:11,219 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1669781235, now seen corresponding path program 87 times [2021-07-13 20:10:11,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:11,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314695676] [2021-07-13 20:10:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:11,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:11,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314695676] [2021-07-13 20:10:11,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314695676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:11,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461173149] [2021-07-13 20:10:11,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:11,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:10:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:11,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:10:11,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:12,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:12,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:12,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:12,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:12,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:12,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 55 [2021-07-13 20:10:12,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:12,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:157, output treesize:7 [2021-07-13 20:10:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:12,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461173149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:12,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:12,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-13 20:10:12,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577151485] [2021-07-13 20:10:12,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:10:12,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:10:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:12,310 INFO L87 Difference]: Start difference. First operand 1927 states and 3812 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:12,673 INFO L93 Difference]: Finished difference Result 4338 states and 8863 transitions. [2021-07-13 20:10:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:10:12,674 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:12,678 INFO L225 Difference]: With dead ends: 4338 [2021-07-13 20:10:12,678 INFO L226 Difference]: Without dead ends: 4168 [2021-07-13 20:10:12,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 883.2ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-07-13 20:10:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 1762. [2021-07-13 20:10:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.9806927881885292) internal successors, (3488), 1761 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3488 transitions. [2021-07-13 20:10:12,702 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3488 transitions. Word has length 43 [2021-07-13 20:10:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:12,702 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3488 transitions. [2021-07-13 20:10:12,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3488 transitions. [2021-07-13 20:10:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:12,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:12,704 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:12,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:12,920 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1165214173, now seen corresponding path program 88 times [2021-07-13 20:10:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:12,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100271975] [2021-07-13 20:10:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:13,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:13,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100271975] [2021-07-13 20:10:13,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100271975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:13,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209914311] [2021-07-13 20:10:13,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:13,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:13,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:13,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:10:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:13,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:13,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:13,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:13,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:13,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:13,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:10:13,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:13,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:13,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:13,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:10:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:14,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209914311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:14,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:14,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-13 20:10:14,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064245676] [2021-07-13 20:10:14,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:10:14,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:14,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:10:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:14,004 INFO L87 Difference]: Start difference. First operand 1762 states and 3488 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:14,557 INFO L93 Difference]: Finished difference Result 3585 states and 7206 transitions. [2021-07-13 20:10:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:10:14,558 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:14,562 INFO L225 Difference]: With dead ends: 3585 [2021-07-13 20:10:14,562 INFO L226 Difference]: Without dead ends: 3557 [2021-07-13 20:10:14,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 872.0ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-07-13 20:10:14,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 1810. [2021-07-13 20:10:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.9773355444997236) internal successors, (3577), 1809 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3577 transitions. [2021-07-13 20:10:14,585 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3577 transitions. Word has length 43 [2021-07-13 20:10:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:14,585 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 3577 transitions. [2021-07-13 20:10:14,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:14,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3577 transitions. [2021-07-13 20:10:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:14,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:14,587 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:14,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:14,802 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2078296685, now seen corresponding path program 89 times [2021-07-13 20:10:14,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:14,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868490052] [2021-07-13 20:10:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:15,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:15,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868490052] [2021-07-13 20:10:15,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868490052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:15,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252156598] [2021-07-13 20:10:15,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:15,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:10:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:15,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:10:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:15,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:15,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:15,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:15,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:10:15,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:15,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:15,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:15,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:10:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:15,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252156598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:15,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:15,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-13 20:10:15,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880032262] [2021-07-13 20:10:15,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:10:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:10:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:15,900 INFO L87 Difference]: Start difference. First operand 1810 states and 3577 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:16,446 INFO L93 Difference]: Finished difference Result 3241 states and 6488 transitions. [2021-07-13 20:10:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:10:16,446 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:16,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:16,450 INFO L225 Difference]: With dead ends: 3241 [2021-07-13 20:10:16,450 INFO L226 Difference]: Without dead ends: 3198 [2021-07-13 20:10:16,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 880.2ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-07-13 20:10:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 1867. [2021-07-13 20:10:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.9715969989281887) internal successors, (3679), 1866 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3679 transitions. [2021-07-13 20:10:16,470 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3679 transitions. Word has length 43 [2021-07-13 20:10:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:16,471 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 3679 transitions. [2021-07-13 20:10:16,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3679 transitions. [2021-07-13 20:10:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:16,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:16,472 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:16,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-13 20:10:16,688 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:16,689 INFO L82 PathProgramCache]: Analyzing trace with hash 850764899, now seen corresponding path program 90 times [2021-07-13 20:10:16,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:16,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000100690] [2021-07-13 20:10:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:16,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:16,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000100690] [2021-07-13 20:10:16,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000100690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:16,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199676497] [2021-07-13 20:10:16,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:16,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:10:16,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:16,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:10:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:17,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:17,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:17,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:17,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:17,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:10:17,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:17,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:17,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:17,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:10:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:17,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199676497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:17,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:17,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-07-13 20:10:17,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859454827] [2021-07-13 20:10:17,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:10:17,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:17,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:10:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:10:17,667 INFO L87 Difference]: Start difference. First operand 1867 states and 3679 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:18,038 INFO L93 Difference]: Finished difference Result 3671 states and 7373 transitions. [2021-07-13 20:10:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:10:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:18,042 INFO L225 Difference]: With dead ends: 3671 [2021-07-13 20:10:18,042 INFO L226 Difference]: Without dead ends: 3369 [2021-07-13 20:10:18,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:10:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-07-13 20:10:18,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 2005. [2021-07-13 20:10:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.966067864271457) internal successors, (3940), 2004 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3940 transitions. [2021-07-13 20:10:18,064 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3940 transitions. Word has length 43 [2021-07-13 20:10:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:18,064 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 3940 transitions. [2021-07-13 20:10:18,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3940 transitions. [2021-07-13 20:10:18,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:18,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:18,065 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:18,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:18,285 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1086380131, now seen corresponding path program 91 times [2021-07-13 20:10:18,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:18,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178101962] [2021-07-13 20:10:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:18,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:18,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178101962] [2021-07-13 20:10:18,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178101962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:18,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498427964] [2021-07-13 20:10:18,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:18,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:10:18,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:19,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:10:19,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:19,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:19,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:19,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:10:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:19,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498427964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:19,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:19,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-13 20:10:19,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138662207] [2021-07-13 20:10:19,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:10:19,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:19,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:10:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:19,381 INFO L87 Difference]: Start difference. First operand 2005 states and 3940 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:19,805 INFO L93 Difference]: Finished difference Result 3677 states and 7454 transitions. [2021-07-13 20:10:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:10:19,805 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:19,810 INFO L225 Difference]: With dead ends: 3677 [2021-07-13 20:10:19,810 INFO L226 Difference]: Without dead ends: 3555 [2021-07-13 20:10:19,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 876.2ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:19,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2021-07-13 20:10:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2026. [2021-07-13 20:10:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 1.9664197530864198) internal successors, (3982), 2025 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 3982 transitions. [2021-07-13 20:10:19,835 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 3982 transitions. Word has length 43 [2021-07-13 20:10:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:19,835 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 3982 transitions. [2021-07-13 20:10:19,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 3982 transitions. [2021-07-13 20:10:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:19,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:19,837 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:20,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 20:10:20,054 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:20,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:20,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1033564323, now seen corresponding path program 92 times [2021-07-13 20:10:20,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:20,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738874659] [2021-07-13 20:10:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:10:20,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:20,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738874659] [2021-07-13 20:10:20,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738874659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:20,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429259497] [2021-07-13 20:10:20,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:20,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:20,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:10:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:10:21,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:21,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:21,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:21,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:10:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:21,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429259497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:21,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:21,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-07-13 20:10:21,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758365211] [2021-07-13 20:10:21,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:10:21,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:21,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:10:21,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:10:21,056 INFO L87 Difference]: Start difference. First operand 2026 states and 3982 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:21,764 INFO L93 Difference]: Finished difference Result 2865 states and 5658 transitions. [2021-07-13 20:10:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:10:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:10:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:21,767 INFO L225 Difference]: With dead ends: 2865 [2021-07-13 20:10:21,767 INFO L226 Difference]: Without dead ends: 2573 [2021-07-13 20:10:21,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1162.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:10:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-07-13 20:10:21,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2152. [2021-07-13 20:10:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.9655973965597398) internal successors, (4228), 2151 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 4228 transitions. [2021-07-13 20:10:21,787 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 4228 transitions. Word has length 43 [2021-07-13 20:10:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:21,787 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 4228 transitions. [2021-07-13 20:10:21,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 4228 transitions. [2021-07-13 20:10:21,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:10:21,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:21,789 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:22,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:22,010 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:22,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1336709165, now seen corresponding path program 93 times [2021-07-13 20:10:22,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:22,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907763161] [2021-07-13 20:10:22,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:22,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:22,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907763161] [2021-07-13 20:10:22,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907763161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:22,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863165547] [2021-07-13 20:10:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:22,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:10:22,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:22,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-13 20:10:22,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:48,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:48,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:48,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:48,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:48,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:48,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 55 [2021-07-13 20:10:48,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:48,952 INFO L628 ElimStorePlain]: treesize reduction 5, result has 86.5 percent of original size [2021-07-13 20:10:48,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:48,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:167, output treesize:7 [2021-07-13 20:10:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:48,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863165547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:48,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:48,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-07-13 20:10:48,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621311626] [2021-07-13 20:10:48,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:10:48,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:48,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:10:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=837, Unknown=9, NotChecked=0, Total=930 [2021-07-13 20:10:48,963 INFO L87 Difference]: Start difference. First operand 2152 states and 4228 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,194 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-07-13 20:11:43,889 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-13 20:11:50,247 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2021-07-13 20:12:16,665 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-07-13 20:12:41,561 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2021-07-13 20:12:54,090 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:13:36,032 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-13 20:15:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:10,380 INFO L93 Difference]: Finished difference Result 3588 states and 7132 transitions. [2021-07-13 20:15:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:15:10,412 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:10,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:10,417 INFO L225 Difference]: With dead ends: 3588 [2021-07-13 20:15:10,417 INFO L226 Difference]: Without dead ends: 3323 [2021-07-13 20:15:10,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 92082.3ms TimeCoverageRelationStatistics Valid=196, Invalid=2036, Unknown=24, NotChecked=0, Total=2256 [2021-07-13 20:15:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-07-13 20:15:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 2161. [2021-07-13 20:15:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 1.963425925925926) internal successors, (4241), 2160 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 4241 transitions. [2021-07-13 20:15:10,441 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 4241 transitions. Word has length 43 [2021-07-13 20:15:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:10,441 INFO L482 AbstractCegarLoop]: Abstraction has 2161 states and 4241 transitions. [2021-07-13 20:15:10,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 4241 transitions. [2021-07-13 20:15:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:10,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:10,443 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:10,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:10,659 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:10,659 INFO L82 PathProgramCache]: Analyzing trace with hash 994068947, now seen corresponding path program 94 times [2021-07-13 20:15:10,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:10,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61572053] [2021-07-13 20:15:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:10,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:10,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61572053] [2021-07-13 20:15:10,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61572053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:10,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391438887] [2021-07-13 20:15:10,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:11,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:11,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:11,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:11,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:11,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:11,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:11,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:11,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:11,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391438887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:11,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:11,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-07-13 20:15:11,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578565742] [2021-07-13 20:15:11,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:11,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:11,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:11,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:11,757 INFO L87 Difference]: Start difference. First operand 2161 states and 4241 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:12,174 INFO L93 Difference]: Finished difference Result 3990 states and 7983 transitions. [2021-07-13 20:15:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:15:12,174 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:12,178 INFO L225 Difference]: With dead ends: 3990 [2021-07-13 20:15:12,178 INFO L226 Difference]: Without dead ends: 3926 [2021-07-13 20:15:12,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 865.4ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-07-13 20:15:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 2170. [2021-07-13 20:15:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.9594283079760257) internal successors, (4250), 2169 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 4250 transitions. [2021-07-13 20:15:12,204 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 4250 transitions. Word has length 43 [2021-07-13 20:15:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:12,204 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 4250 transitions. [2021-07-13 20:15:12,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 4250 transitions. [2021-07-13 20:15:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:12,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:12,206 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:12,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 20:15:12,422 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1101093933, now seen corresponding path program 95 times [2021-07-13 20:15:12,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:12,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229858669] [2021-07-13 20:15:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:12,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:12,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229858669] [2021-07-13 20:15:12,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229858669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:12,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855543376] [2021-07-13 20:15:12,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:12,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:15:12,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:12,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:15:12,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:13,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:13,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:13,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:13,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:13,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:13,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:13,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:13,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:13,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:13,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:13,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:13,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855543376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:13,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:13,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-13 20:15:13,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615039639] [2021-07-13 20:15:13,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:15:13,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:13,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:15:13,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:15:13,566 INFO L87 Difference]: Start difference. First operand 2170 states and 4250 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:14,094 INFO L93 Difference]: Finished difference Result 3989 states and 7996 transitions. [2021-07-13 20:15:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:15:14,094 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:14,099 INFO L225 Difference]: With dead ends: 3989 [2021-07-13 20:15:14,099 INFO L226 Difference]: Without dead ends: 3711 [2021-07-13 20:15:14,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 911.1ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:15:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-07-13 20:15:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2218. [2021-07-13 20:15:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.958953540820929) internal successors, (4343), 2217 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-07-13 20:15:14,127 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-07-13 20:15:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:14,127 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-07-13 20:15:14,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-07-13 20:15:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:14,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:14,129 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:14,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 20:15:14,345 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1208361635, now seen corresponding path program 96 times [2021-07-13 20:15:14,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:14,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678336181] [2021-07-13 20:15:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:14,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:14,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678336181] [2021-07-13 20:15:14,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678336181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:14,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393929278] [2021-07-13 20:15:14,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:14,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:15:14,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:14,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:15,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:15,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:15,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:15,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:15,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:15,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:15,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:15,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:15,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:15,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:15,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393929278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:15,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:15,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-13 20:15:15,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507812684] [2021-07-13 20:15:15,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:15:15,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:15,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:15:15,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:15:15,551 INFO L87 Difference]: Start difference. First operand 2218 states and 4343 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:16,187 INFO L93 Difference]: Finished difference Result 3315 states and 6548 transitions. [2021-07-13 20:15:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:15:16,188 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:16,191 INFO L225 Difference]: With dead ends: 3315 [2021-07-13 20:15:16,191 INFO L226 Difference]: Without dead ends: 3300 [2021-07-13 20:15:16,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 921.3ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:15:16,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2021-07-13 20:15:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 2218. [2021-07-13 20:15:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.958953540820929) internal successors, (4343), 2217 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-07-13 20:15:16,213 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-07-13 20:15:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:16,213 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-07-13 20:15:16,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-07-13 20:15:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:16,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:16,215 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:16,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:16,420 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash 236561603, now seen corresponding path program 97 times [2021-07-13 20:15:16,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:16,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050797982] [2021-07-13 20:15:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:16,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:16,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050797982] [2021-07-13 20:15:16,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050797982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:16,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326821484] [2021-07-13 20:15:16,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:16,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:16,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:17,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:17,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:17,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:17,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:17,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:17,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:17,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:17,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:17,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326821484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:17,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:17,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-13 20:15:17,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333603363] [2021-07-13 20:15:17,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:17,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:17,534 INFO L87 Difference]: Start difference. First operand 2218 states and 4343 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:18,031 INFO L93 Difference]: Finished difference Result 4305 states and 8580 transitions. [2021-07-13 20:15:18,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:15:18,031 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:18,036 INFO L225 Difference]: With dead ends: 4305 [2021-07-13 20:15:18,036 INFO L226 Difference]: Without dead ends: 4235 [2021-07-13 20:15:18,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 878.3ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-07-13 20:15:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2425. [2021-07-13 20:15:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 1.953795379537954) internal successors, (4736), 2424 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 4736 transitions. [2021-07-13 20:15:18,064 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 4736 transitions. Word has length 43 [2021-07-13 20:15:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:18,064 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 4736 transitions. [2021-07-13 20:15:18,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 4736 transitions. [2021-07-13 20:15:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:18,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:18,066 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:18,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 20:15:18,282 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:18,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:18,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1240929379, now seen corresponding path program 98 times [2021-07-13 20:15:18,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:18,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895345808] [2021-07-13 20:15:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:18,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:18,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895345808] [2021-07-13 20:15:18,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895345808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:18,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566011304] [2021-07-13 20:15:18,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:18,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:18,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:18,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:18,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:19,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:19,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:19,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:19,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:19,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:19,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:19,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:19,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:19,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566011304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:19,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:19,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-07-13 20:15:19,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109361087] [2021-07-13 20:15:19,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:15:19,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:15:19,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:15:19,221 INFO L87 Difference]: Start difference. First operand 2425 states and 4736 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:20,066 INFO L93 Difference]: Finished difference Result 3888 states and 7643 transitions. [2021-07-13 20:15:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:15:20,066 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:20,070 INFO L225 Difference]: With dead ends: 3888 [2021-07-13 20:15:20,070 INFO L226 Difference]: Without dead ends: 3511 [2021-07-13 20:15:20,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1072.4ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:15:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-07-13 20:15:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2797. [2021-07-13 20:15:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 1.9549356223175967) internal successors, (5466), 2796 states have internal predecessors, (5466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 5466 transitions. [2021-07-13 20:15:20,098 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 5466 transitions. Word has length 43 [2021-07-13 20:15:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:20,098 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 5466 transitions. [2021-07-13 20:15:20,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 5466 transitions. [2021-07-13 20:15:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:20,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:20,101 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:20,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:15:20,317 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash -893728877, now seen corresponding path program 99 times [2021-07-13 20:15:20,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:20,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669774555] [2021-07-13 20:15:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:20,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:20,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669774555] [2021-07-13 20:15:20,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669774555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:20,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035500293] [2021-07-13 20:15:20,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:20,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:15:20,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:20,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:21,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:21,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:21,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:21,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:21,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:21,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:21,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:21,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:21,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:21,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035500293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:21,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:21,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-13 20:15:21,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077381962] [2021-07-13 20:15:21,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:21,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:21,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:21,380 INFO L87 Difference]: Start difference. First operand 2797 states and 5466 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:21,805 INFO L93 Difference]: Finished difference Result 4489 states and 9045 transitions. [2021-07-13 20:15:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:15:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:21,810 INFO L225 Difference]: With dead ends: 4489 [2021-07-13 20:15:21,810 INFO L226 Difference]: Without dead ends: 4335 [2021-07-13 20:15:21,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 839.7ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-07-13 20:15:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2827. [2021-07-13 20:15:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 1.9554140127388535) internal successors, (5526), 2826 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 5526 transitions. [2021-07-13 20:15:21,841 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 5526 transitions. Word has length 43 [2021-07-13 20:15:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:21,841 INFO L482 AbstractCegarLoop]: Abstraction has 2827 states and 5526 transitions. [2021-07-13 20:15:21,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 5526 transitions. [2021-07-13 20:15:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:21,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:21,843 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:22,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 20:15:22,048 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash -946544685, now seen corresponding path program 100 times [2021-07-13 20:15:22,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:22,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809560474] [2021-07-13 20:15:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:22,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:22,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809560474] [2021-07-13 20:15:22,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809560474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:22,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271168166] [2021-07-13 20:15:22,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:22,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:22,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:22,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:23,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:23,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:23,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:23,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:23,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:23,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:23,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:23,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:23,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:23,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:23,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:23,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:23,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271168166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:23,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:23,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-07-13 20:15:23,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349073407] [2021-07-13 20:15:23,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:15:23,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:23,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:15:23,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:15:23,063 INFO L87 Difference]: Start difference. First operand 2827 states and 5526 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:24,084 INFO L93 Difference]: Finished difference Result 4129 states and 8090 transitions. [2021-07-13 20:15:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:15:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:24,088 INFO L225 Difference]: With dead ends: 4129 [2021-07-13 20:15:24,089 INFO L226 Difference]: Without dead ends: 3769 [2021-07-13 20:15:24,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1247.0ms TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:15:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-07-13 20:15:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3141. [2021-07-13 20:15:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 3140 states have (on average 1.9576433121019108) internal successors, (6147), 3140 states have internal predecessors, (6147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 6147 transitions. [2021-07-13 20:15:24,154 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 6147 transitions. Word has length 43 [2021-07-13 20:15:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:24,154 INFO L482 AbstractCegarLoop]: Abstraction has 3141 states and 6147 transitions. [2021-07-13 20:15:24,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 6147 transitions. [2021-07-13 20:15:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:24,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:24,157 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:24,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:24,373 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash -986040061, now seen corresponding path program 101 times [2021-07-13 20:15:24,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:24,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357725422] [2021-07-13 20:15:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:24,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:24,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357725422] [2021-07-13 20:15:24,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357725422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:24,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568882276] [2021-07-13 20:15:24,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:24,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:15:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:24,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:15:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:25,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:25,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:25,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:25,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:25,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:25,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:25,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:25,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:25,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:25,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:25,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:25,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568882276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:25,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:25,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2021-07-13 20:15:25,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491564525] [2021-07-13 20:15:25,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:15:25,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:25,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:15:25,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:25,496 INFO L87 Difference]: Start difference. First operand 3141 states and 6147 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:25,926 INFO L93 Difference]: Finished difference Result 5700 states and 11356 transitions. [2021-07-13 20:15:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:15:25,927 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:25,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:25,934 INFO L225 Difference]: With dead ends: 5700 [2021-07-13 20:15:25,934 INFO L226 Difference]: Without dead ends: 5434 [2021-07-13 20:15:25,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 885.0ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-07-13 20:15:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3258. [2021-07-13 20:15:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 1.9610070617132331) internal successors, (6387), 3257 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 6387 transitions. [2021-07-13 20:15:25,979 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 6387 transitions. Word has length 43 [2021-07-13 20:15:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:25,979 INFO L482 AbstractCegarLoop]: Abstraction has 3258 states and 6387 transitions. [2021-07-13 20:15:25,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 6387 transitions. [2021-07-13 20:15:25,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:25,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:25,982 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:26,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 20:15:26,198 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:26,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1213764355, now seen corresponding path program 102 times [2021-07-13 20:15:26,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:26,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053548228] [2021-07-13 20:15:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:26,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:26,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053548228] [2021-07-13 20:15:26,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053548228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:26,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894078208] [2021-07-13 20:15:26,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:26,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:15:26,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:26,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:15:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:27,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:27,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:27,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:27,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:27,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:27,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:27,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894078208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:27,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:27,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-13 20:15:27,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101146653] [2021-07-13 20:15:27,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:27,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:27,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:27,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:27,323 INFO L87 Difference]: Start difference. First operand 3258 states and 6387 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:28,008 INFO L93 Difference]: Finished difference Result 4967 states and 9920 transitions. [2021-07-13 20:15:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:15:28,009 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:28,016 INFO L225 Difference]: With dead ends: 4967 [2021-07-13 20:15:28,016 INFO L226 Difference]: Without dead ends: 4691 [2021-07-13 20:15:28,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 906.4ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-07-13 20:15:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3321. [2021-07-13 20:15:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.9623493975903614) internal successors, (6515), 3320 states have internal predecessors, (6515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-07-13 20:15:28,063 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-07-13 20:15:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:28,063 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-07-13 20:15:28,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-07-13 20:15:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:28,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:28,065 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:28,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 20:15:28,283 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:28,283 INFO L82 PathProgramCache]: Analyzing trace with hash -771747373, now seen corresponding path program 103 times [2021-07-13 20:15:28,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:28,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643493945] [2021-07-13 20:15:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:28,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:28,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643493945] [2021-07-13 20:15:28,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643493945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:28,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618908632] [2021-07-13 20:15:28,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:28,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:29,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:29,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:29,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:29,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:29,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:29,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:29,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:29,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618908632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:29,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:29,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-13 20:15:29,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509480985] [2021-07-13 20:15:29,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:29,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:29,343 INFO L87 Difference]: Start difference. First operand 3321 states and 6515 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:29,836 INFO L93 Difference]: Finished difference Result 4281 states and 8456 transitions. [2021-07-13 20:15:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:15:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:29,841 INFO L225 Difference]: With dead ends: 4281 [2021-07-13 20:15:29,841 INFO L226 Difference]: Without dead ends: 4266 [2021-07-13 20:15:29,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-07-13 20:15:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 3321. [2021-07-13 20:15:29,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.9623493975903614) internal successors, (6515), 3320 states have internal predecessors, (6515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-07-13 20:15:29,882 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-07-13 20:15:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:29,882 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-07-13 20:15:29,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-07-13 20:15:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:29,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:29,885 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:30,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:30,098 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1004072413, now seen corresponding path program 104 times [2021-07-13 20:15:30,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:30,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372405716] [2021-07-13 20:15:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:30,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:30,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372405716] [2021-07-13 20:15:30,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372405716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:30,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770157859] [2021-07-13 20:15:30,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:30,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:30,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:30,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:30,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:31,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:31,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:31,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:31,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:31,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:31,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:31,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:31,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:31,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:31,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:31,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770157859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:31,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:31,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-07-13 20:15:31,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282423370] [2021-07-13 20:15:31,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:15:31,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:31,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:15:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:31,150 INFO L87 Difference]: Start difference. First operand 3321 states and 6515 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:31,728 INFO L93 Difference]: Finished difference Result 6029 states and 12136 transitions. [2021-07-13 20:15:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:15:31,728 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:31,735 INFO L225 Difference]: With dead ends: 6029 [2021-07-13 20:15:31,735 INFO L226 Difference]: Without dead ends: 5816 [2021-07-13 20:15:31,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 832.0ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5816 states. [2021-07-13 20:15:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5816 to 3424. [2021-07-13 20:15:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 1.964943032427695) internal successors, (6726), 3423 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 6726 transitions. [2021-07-13 20:15:31,777 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 6726 transitions. Word has length 43 [2021-07-13 20:15:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:31,777 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 6726 transitions. [2021-07-13 20:15:31,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 6726 transitions. [2021-07-13 20:15:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:31,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:31,780 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:31,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:31,996 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:31,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1103420819, now seen corresponding path program 105 times [2021-07-13 20:15:31,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:31,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816258782] [2021-07-13 20:15:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:32,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:32,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816258782] [2021-07-13 20:15:32,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816258782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:32,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380616878] [2021-07-13 20:15:32,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:32,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:15:32,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:32,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:33,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:33,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:33,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:33,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:33,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:33,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:33,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380616878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:33,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:33,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-07-13 20:15:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073349898] [2021-07-13 20:15:33,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:15:33,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:15:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:33,055 INFO L87 Difference]: Start difference. First operand 3424 states and 6726 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:33,586 INFO L93 Difference]: Finished difference Result 5238 states and 10412 transitions. [2021-07-13 20:15:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:15:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:33,593 INFO L225 Difference]: With dead ends: 5238 [2021-07-13 20:15:33,593 INFO L226 Difference]: Without dead ends: 5180 [2021-07-13 20:15:33,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 850.9ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5180 states. [2021-07-13 20:15:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5180 to 3451. [2021-07-13 20:15:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.9663768115942029) internal successors, (6784), 3450 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-07-13 20:15:33,632 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-07-13 20:15:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:33,632 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-07-13 20:15:33,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-07-13 20:15:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:33,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:33,635 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:33,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:33,853 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:33,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash -882090909, now seen corresponding path program 106 times [2021-07-13 20:15:33,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:33,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957214563] [2021-07-13 20:15:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:34,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:34,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957214563] [2021-07-13 20:15:34,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957214563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:34,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010656553] [2021-07-13 20:15:34,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:34,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:34,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:34,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:34,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:34,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:34,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:34,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:34,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:34,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:34,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:34,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:34,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010656553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:34,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:34,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-07-13 20:15:34,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817212416] [2021-07-13 20:15:34,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:15:34,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:34,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:15:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:34,910 INFO L87 Difference]: Start difference. First operand 3451 states and 6784 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:35,411 INFO L93 Difference]: Finished difference Result 4745 states and 9374 transitions. [2021-07-13 20:15:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:15:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:35,417 INFO L225 Difference]: With dead ends: 4745 [2021-07-13 20:15:35,417 INFO L226 Difference]: Without dead ends: 4730 [2021-07-13 20:15:35,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 848.2ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2021-07-13 20:15:35,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 3451. [2021-07-13 20:15:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.9663768115942029) internal successors, (6784), 3450 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-07-13 20:15:35,454 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-07-13 20:15:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:35,454 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-07-13 20:15:35,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-07-13 20:15:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:35,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:35,457 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:35,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:35,673 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:35,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:35,673 INFO L82 PathProgramCache]: Analyzing trace with hash 204094867, now seen corresponding path program 107 times [2021-07-13 20:15:35,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:35,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935528759] [2021-07-13 20:15:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:35,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:35,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935528759] [2021-07-13 20:15:35,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935528759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:35,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766049240] [2021-07-13 20:15:35,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:36,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:15:36,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:36,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:36,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:36,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:36,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:36,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:36,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:36,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:36,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:36,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:36,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:36,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766049240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:36,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:36,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 27 [2021-07-13 20:15:36,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870754604] [2021-07-13 20:15:36,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:15:36,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:15:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:15:36,622 INFO L87 Difference]: Start difference. First operand 3451 states and 6784 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:37,169 INFO L93 Difference]: Finished difference Result 5475 states and 10796 transitions. [2021-07-13 20:15:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:15:37,169 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:37,175 INFO L225 Difference]: With dead ends: 5475 [2021-07-13 20:15:37,175 INFO L226 Difference]: Without dead ends: 5191 [2021-07-13 20:15:37,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 734.6ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:15:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2021-07-13 20:15:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 3671. [2021-07-13 20:15:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.9724795640326975) internal successors, (7239), 3670 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7239 transitions. [2021-07-13 20:15:37,242 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7239 transitions. Word has length 43 [2021-07-13 20:15:37,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:37,242 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7239 transitions. [2021-07-13 20:15:37,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:37,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7239 transitions. [2021-07-13 20:15:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:37,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:37,264 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:37,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:15:37,480 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1930563389, now seen corresponding path program 108 times [2021-07-13 20:15:37,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:37,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754602554] [2021-07-13 20:15:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:37,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:37,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754602554] [2021-07-13 20:15:37,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754602554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:37,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927359810] [2021-07-13 20:15:37,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:37,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:15:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:37,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:37,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:38,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:38,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:38,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:38,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:38,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:38,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:38,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:38,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:38,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927359810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:38,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:38,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-07-13 20:15:38,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416727220] [2021-07-13 20:15:38,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:15:38,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:38,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:15:38,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:15:38,543 INFO L87 Difference]: Start difference. First operand 3671 states and 7239 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:39,256 INFO L93 Difference]: Finished difference Result 5940 states and 12046 transitions. [2021-07-13 20:15:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:15:39,257 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:39,263 INFO L225 Difference]: With dead ends: 5940 [2021-07-13 20:15:39,263 INFO L226 Difference]: Without dead ends: 5733 [2021-07-13 20:15:39,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 820.6ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:15:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2021-07-13 20:15:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 3683. [2021-07-13 20:15:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 1.9731124388919066) internal successors, (7265), 3682 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 7265 transitions. [2021-07-13 20:15:39,307 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 7265 transitions. Word has length 43 [2021-07-13 20:15:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:39,307 INFO L482 AbstractCegarLoop]: Abstraction has 3683 states and 7265 transitions. [2021-07-13 20:15:39,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 7265 transitions. [2021-07-13 20:15:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:39,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:39,311 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:39,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:15:39,527 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:39,527 INFO L82 PathProgramCache]: Analyzing trace with hash 378892179, now seen corresponding path program 109 times [2021-07-13 20:15:39,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:39,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373346623] [2021-07-13 20:15:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:39,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:39,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373346623] [2021-07-13 20:15:39,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373346623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:39,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260135837] [2021-07-13 20:15:39,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:39,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:39,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:40,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:40,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:40,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:40,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:40,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:40,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:40,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:40,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260135837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:40,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:40,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-07-13 20:15:40,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707415432] [2021-07-13 20:15:40,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:15:40,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:40,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:15:40,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:15:40,554 INFO L87 Difference]: Start difference. First operand 3683 states and 7265 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:41,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:41,020 INFO L93 Difference]: Finished difference Result 4821 states and 9570 transitions. [2021-07-13 20:15:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:15:41,020 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:41,026 INFO L225 Difference]: With dead ends: 4821 [2021-07-13 20:15:41,026 INFO L226 Difference]: Without dead ends: 4806 [2021-07-13 20:15:41,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 820.1ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:15:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4806 states. [2021-07-13 20:15:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4806 to 3686. [2021-07-13 20:15:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3685 states have (on average 1.973134328358209) internal successors, (7271), 3685 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 7271 transitions. [2021-07-13 20:15:41,067 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 7271 transitions. Word has length 43 [2021-07-13 20:15:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:41,067 INFO L482 AbstractCegarLoop]: Abstraction has 3686 states and 7271 transitions. [2021-07-13 20:15:41,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 7271 transitions. [2021-07-13 20:15:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:41,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:41,070 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:41,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:15:41,285 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:41,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2138105379, now seen corresponding path program 110 times [2021-07-13 20:15:41,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:41,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552217379] [2021-07-13 20:15:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:41,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:41,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552217379] [2021-07-13 20:15:41,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552217379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:41,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584591723] [2021-07-13 20:15:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:41,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:41,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:41,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:41,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:42,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:42,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:42,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:42,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:42,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:42,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:42,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:42,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:42,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584591723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:42,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:42,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-07-13 20:15:42,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650452884] [2021-07-13 20:15:42,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:15:42,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:42,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:15:42,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:15:42,302 INFO L87 Difference]: Start difference. First operand 3686 states and 7271 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:42,894 INFO L93 Difference]: Finished difference Result 5294 states and 10543 transitions. [2021-07-13 20:15:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:15:42,894 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:42,900 INFO L225 Difference]: With dead ends: 5294 [2021-07-13 20:15:42,901 INFO L226 Difference]: Without dead ends: 5264 [2021-07-13 20:15:42,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 810.0ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:15:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5264 states. [2021-07-13 20:15:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5264 to 3722. [2021-07-13 20:15:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 1.97420048374093) internal successors, (7346), 3721 states have internal predecessors, (7346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 7346 transitions. [2021-07-13 20:15:42,944 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 7346 transitions. Word has length 43 [2021-07-13 20:15:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:42,944 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 7346 transitions. [2021-07-13 20:15:42,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 7346 transitions. [2021-07-13 20:15:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:42,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:42,947 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:43,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:43,161 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1246050477, now seen corresponding path program 111 times [2021-07-13 20:15:43,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:43,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840001477] [2021-07-13 20:15:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:43,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:43,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840001477] [2021-07-13 20:15:43,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840001477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:43,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219430413] [2021-07-13 20:15:43,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:43,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:15:43,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:43,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:44,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:44,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:44,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:44,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:44,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:44,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-07-13 20:15:44,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:44,410 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:15:44,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:44,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-07-13 20:15:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:44,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219430413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:44,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:44,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-13 20:15:44,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470019324] [2021-07-13 20:15:44,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:44,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:44,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:44,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:44,422 INFO L87 Difference]: Start difference. First operand 3722 states and 7346 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:46,738 INFO L93 Difference]: Finished difference Result 5592 states and 11061 transitions. [2021-07-13 20:15:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:15:46,739 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:46,745 INFO L225 Difference]: With dead ends: 5592 [2021-07-13 20:15:46,745 INFO L226 Difference]: Without dead ends: 5209 [2021-07-13 20:15:46,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2415.5ms TimeCoverageRelationStatistics Valid=248, Invalid=2508, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:15:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2021-07-13 20:15:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 4162. [2021-07-13 20:15:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4161 states have (on average 1.9699591444364335) internal successors, (8197), 4161 states have internal predecessors, (8197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 8197 transitions. [2021-07-13 20:15:46,790 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 8197 transitions. Word has length 43 [2021-07-13 20:15:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:46,790 INFO L482 AbstractCegarLoop]: Abstraction has 4162 states and 8197 transitions. [2021-07-13 20:15:46,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 8197 transitions. [2021-07-13 20:15:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:46,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:46,793 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:47,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 20:15:47,010 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:47,011 INFO L82 PathProgramCache]: Analyzing trace with hash 214609235, now seen corresponding path program 112 times [2021-07-13 20:15:47,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:47,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046889547] [2021-07-13 20:15:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:47,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046889547] [2021-07-13 20:15:47,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046889547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096708804] [2021-07-13 20:15:47,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:47,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:47,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:47,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:47,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:47,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:47,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:47,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:47,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:47,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:47,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:47,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:47,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096708804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:47,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:47,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-07-13 20:15:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472723534] [2021-07-13 20:15:47,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:15:47,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:15:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:15:47,894 INFO L87 Difference]: Start difference. First operand 4162 states and 8197 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:49,280 INFO L93 Difference]: Finished difference Result 7069 states and 14124 transitions. [2021-07-13 20:15:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:15:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:49,289 INFO L225 Difference]: With dead ends: 7069 [2021-07-13 20:15:49,289 INFO L226 Difference]: Without dead ends: 6666 [2021-07-13 20:15:49,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1535.9ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:15:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2021-07-13 20:15:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 4415. [2021-07-13 20:15:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4414 states have (on average 1.9725872224739465) internal successors, (8707), 4414 states have internal predecessors, (8707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 8707 transitions. [2021-07-13 20:15:49,346 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 8707 transitions. Word has length 43 [2021-07-13 20:15:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:49,346 INFO L482 AbstractCegarLoop]: Abstraction has 4415 states and 8707 transitions. [2021-07-13 20:15:49,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 8707 transitions. [2021-07-13 20:15:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:49,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:49,350 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:49,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:49,567 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1068380643, now seen corresponding path program 113 times [2021-07-13 20:15:49,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:49,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149046348] [2021-07-13 20:15:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:49,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:49,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149046348] [2021-07-13 20:15:49,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149046348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:49,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598675699] [2021-07-13 20:15:49,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:49,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:15:49,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:49,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:50,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:50,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:50,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:50,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:50,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:50,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:50,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-07-13 20:15:50,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:50,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:50,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:50,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-07-13 20:15:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:50,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598675699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:50,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:50,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-07-13 20:15:50,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991851748] [2021-07-13 20:15:50,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:50,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:50,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:50,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:50,625 INFO L87 Difference]: Start difference. First operand 4415 states and 8707 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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) [2021-07-13 20:15:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:52,098 INFO L93 Difference]: Finished difference Result 5648 states and 11150 transitions. [2021-07-13 20:15:52,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:15:52,099 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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 43 [2021-07-13 20:15:52,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:52,105 INFO L225 Difference]: With dead ends: 5648 [2021-07-13 20:15:52,105 INFO L226 Difference]: Without dead ends: 5539 [2021-07-13 20:15:52,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1709.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2021-07-13 20:15:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4486. [2021-07-13 20:15:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4486 states, 4485 states have (on average 1.9745819397993312) internal successors, (8856), 4485 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 8856 transitions. [2021-07-13 20:15:52,164 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 8856 transitions. Word has length 43 [2021-07-13 20:15:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:52,164 INFO L482 AbstractCegarLoop]: Abstraction has 4486 states and 8856 transitions. [2021-07-13 20:15:52,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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) [2021-07-13 20:15:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 8856 transitions. [2021-07-13 20:15:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:52,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:52,168 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:52,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 20:15:52,384 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:52,384 INFO L82 PathProgramCache]: Analyzing trace with hash -198698669, now seen corresponding path program 114 times [2021-07-13 20:15:52,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:52,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732840845] [2021-07-13 20:15:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:52,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:52,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732840845] [2021-07-13 20:15:52,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732840845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:52,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751279037] [2021-07-13 20:15:52,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:52,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:15:52,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:52,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:53,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:53,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:53,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:53,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:53,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:53,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751279037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:53,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:53,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-07-13 20:15:53,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234966086] [2021-07-13 20:15:53,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:15:53,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:53,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:15:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:15:53,211 INFO L87 Difference]: Start difference. First operand 4486 states and 8856 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:53,593 INFO L93 Difference]: Finished difference Result 6505 states and 12851 transitions. [2021-07-13 20:15:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:15:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:53,601 INFO L225 Difference]: With dead ends: 6505 [2021-07-13 20:15:53,601 INFO L226 Difference]: Without dead ends: 6237 [2021-07-13 20:15:53,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 651.8ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:15:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-07-13 20:15:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 4662. [2021-07-13 20:15:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 4661 states have (on average 1.977043552885647) internal successors, (9215), 4661 states have internal predecessors, (9215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 9215 transitions. [2021-07-13 20:15:53,682 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 9215 transitions. Word has length 43 [2021-07-13 20:15:53,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:53,682 INFO L482 AbstractCegarLoop]: Abstraction has 4662 states and 9215 transitions. [2021-07-13 20:15:53,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 9215 transitions. [2021-07-13 20:15:53,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:53,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:53,686 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:53,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:53,902 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:53,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1284041555, now seen corresponding path program 115 times [2021-07-13 20:15:53,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:53,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858047653] [2021-07-13 20:15:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:54,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:54,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858047653] [2021-07-13 20:15:54,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858047653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:54,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777221409] [2021-07-13 20:15:54,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:54,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:54,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:54,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:54,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:54,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:54,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:54,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:54,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:54,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:54,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777221409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:54,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:54,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-07-13 20:15:54,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48477029] [2021-07-13 20:15:54,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:15:54,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:54,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:15:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:15:54,765 INFO L87 Difference]: Start difference. First operand 4662 states and 9215 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:55,110 INFO L93 Difference]: Finished difference Result 6935 states and 13838 transitions. [2021-07-13 20:15:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:15:55,110 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:55,118 INFO L225 Difference]: With dead ends: 6935 [2021-07-13 20:15:55,118 INFO L226 Difference]: Without dead ends: 6690 [2021-07-13 20:15:55,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 688.4ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:15:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6690 states. [2021-07-13 20:15:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6690 to 5133. [2021-07-13 20:15:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5133 states, 5132 states have (on average 1.9912314886983633) internal successors, (10219), 5132 states have internal predecessors, (10219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5133 states to 5133 states and 10219 transitions. [2021-07-13 20:15:55,178 INFO L78 Accepts]: Start accepts. Automaton has 5133 states and 10219 transitions. Word has length 43 [2021-07-13 20:15:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:55,178 INFO L482 AbstractCegarLoop]: Abstraction has 5133 states and 10219 transitions. [2021-07-13 20:15:55,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 5133 states and 10219 transitions. [2021-07-13 20:15:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:55,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:55,182 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:55,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:55,398 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1550266029, now seen corresponding path program 116 times [2021-07-13 20:15:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:55,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366639886] [2021-07-13 20:15:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:55,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:55,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366639886] [2021-07-13 20:15:55,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366639886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:55,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981721017] [2021-07-13 20:15:55,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:55,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:55,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:55,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:55,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:56,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:56,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:56,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:56,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:56,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:56,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:56,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981721017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:56,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:56,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-07-13 20:15:56,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178488390] [2021-07-13 20:15:56,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:15:56,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:15:56,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:15:56,281 INFO L87 Difference]: Start difference. First operand 5133 states and 10219 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:56,665 INFO L93 Difference]: Finished difference Result 7659 states and 15381 transitions. [2021-07-13 20:15:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:15:56,666 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:56,675 INFO L225 Difference]: With dead ends: 7659 [2021-07-13 20:15:56,675 INFO L226 Difference]: Without dead ends: 7594 [2021-07-13 20:15:56,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 702.3ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:15:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-07-13 20:15:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 4965. [2021-07-13 20:15:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 4964 states have (on average 1.984488315874295) internal successors, (9851), 4964 states have internal predecessors, (9851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 9851 transitions. [2021-07-13 20:15:56,739 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 9851 transitions. Word has length 43 [2021-07-13 20:15:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:56,739 INFO L482 AbstractCegarLoop]: Abstraction has 4965 states and 9851 transitions. [2021-07-13 20:15:56,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 9851 transitions. [2021-07-13 20:15:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:56,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:56,743 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:56,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-13 20:15:56,950 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1458838867, now seen corresponding path program 117 times [2021-07-13 20:15:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:56,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366559025] [2021-07-13 20:15:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:57,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366559025] [2021-07-13 20:15:57,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366559025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812823350] [2021-07-13 20:15:57,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:57,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:15:57,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:57,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:57,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:57,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:57,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:57,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:57,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:57,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:57,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:57,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:57,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812823350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:57,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:57,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-07-13 20:15:57,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135632363] [2021-07-13 20:15:57,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:15:57,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:15:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:15:57,843 INFO L87 Difference]: Start difference. First operand 4965 states and 9851 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:58,211 INFO L93 Difference]: Finished difference Result 6720 states and 13442 transitions. [2021-07-13 20:15:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:15:58,212 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:58,220 INFO L225 Difference]: With dead ends: 6720 [2021-07-13 20:15:58,220 INFO L226 Difference]: Without dead ends: 6615 [2021-07-13 20:15:58,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:15:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6615 states. [2021-07-13 20:15:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6615 to 4980. [2021-07-13 20:15:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4979 states have (on average 1.9847358907411126) internal successors, (9882), 4979 states have internal predecessors, (9882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 9882 transitions. [2021-07-13 20:15:58,282 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 9882 transitions. Word has length 43 [2021-07-13 20:15:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:58,282 INFO L482 AbstractCegarLoop]: Abstraction has 4980 states and 9882 transitions. [2021-07-13 20:15:58,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 9882 transitions. [2021-07-13 20:15:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:58,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:58,287 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:58,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:15:58,505 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:58,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2103144989, now seen corresponding path program 118 times [2021-07-13 20:15:58,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:58,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672998143] [2021-07-13 20:15:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:58,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:58,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672998143] [2021-07-13 20:15:58,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672998143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:58,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528839437] [2021-07-13 20:15:58,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:58,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:58,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:58,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:15:58,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:59,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:59,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:15:59,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:59,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:59,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:59,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:15:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:59,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528839437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:59,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:59,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 24 [2021-07-13 20:15:59,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690798894] [2021-07-13 20:15:59,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:15:59,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:59,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:15:59,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:15:59,304 INFO L87 Difference]: Start difference. First operand 4980 states and 9882 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:59,614 INFO L93 Difference]: Finished difference Result 6288 states and 12461 transitions. [2021-07-13 20:15:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:15:59,614 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:15:59,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:59,622 INFO L225 Difference]: With dead ends: 6288 [2021-07-13 20:15:59,622 INFO L226 Difference]: Without dead ends: 6061 [2021-07-13 20:15:59,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 606.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:15:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-07-13 20:15:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 5116. [2021-07-13 20:15:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5116 states, 5115 states have (on average 1.9896383186705768) internal successors, (10177), 5115 states have internal predecessors, (10177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 10177 transitions. [2021-07-13 20:15:59,686 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 10177 transitions. Word has length 43 [2021-07-13 20:15:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:59,686 INFO L482 AbstractCegarLoop]: Abstraction has 5116 states and 10177 transitions. [2021-07-13 20:15:59,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 10177 transitions. [2021-07-13 20:15:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:15:59,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:59,691 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:59,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:59,907 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:59,908 INFO L82 PathProgramCache]: Analyzing trace with hash -642485277, now seen corresponding path program 119 times [2021-07-13 20:15:59,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:59,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164928168] [2021-07-13 20:15:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:00,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:00,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164928168] [2021-07-13 20:16:00,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164928168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:00,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37460277] [2021-07-13 20:16:00,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:00,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:16:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:00,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:16:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:00,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:16:00,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:00,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:00,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:00,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:16:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:00,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37460277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:00,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:00,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 25 [2021-07-13 20:16:00,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083213602] [2021-07-13 20:16:00,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:16:00,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:00,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:16:00,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:16:00,682 INFO L87 Difference]: Start difference. First operand 5116 states and 10177 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:01,105 INFO L93 Difference]: Finished difference Result 6874 states and 13706 transitions. [2021-07-13 20:16:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:16:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:01,114 INFO L225 Difference]: With dead ends: 6874 [2021-07-13 20:16:01,114 INFO L226 Difference]: Without dead ends: 6829 [2021-07-13 20:16:01,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:16:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2021-07-13 20:16:01,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 5057. [2021-07-13 20:16:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 1.987737341772152) internal successors, (10050), 5056 states have internal predecessors, (10050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 10050 transitions. [2021-07-13 20:16:01,188 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 10050 transitions. Word has length 43 [2021-07-13 20:16:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:01,188 INFO L482 AbstractCegarLoop]: Abstraction has 5057 states and 10050 transitions. [2021-07-13 20:16:01,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 10050 transitions. [2021-07-13 20:16:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:01,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:01,192 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:01,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 20:16:01,408 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:01,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1402807837, now seen corresponding path program 120 times [2021-07-13 20:16:01,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:01,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716727769] [2021-07-13 20:16:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:01,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:01,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716727769] [2021-07-13 20:16:01,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716727769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:01,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416332457] [2021-07-13 20:16:01,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:01,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:16:01,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:01,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:16:01,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:02,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:02,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:02,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:02,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:02,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:02,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:02,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 55 [2021-07-13 20:16:02,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:02,758 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:16:02,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:02,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:159, output treesize:7 [2021-07-13 20:16:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:02,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416332457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:02,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:02,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 26 [2021-07-13 20:16:02,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771650805] [2021-07-13 20:16:02,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:16:02,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:02,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:16:02,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:16:02,769 INFO L87 Difference]: Start difference. First operand 5057 states and 10050 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:05,581 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:16:06,704 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:16:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:08,109 INFO L93 Difference]: Finished difference Result 7825 states and 15639 transitions. [2021-07-13 20:16:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:16:08,110 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:08,120 INFO L225 Difference]: With dead ends: 7825 [2021-07-13 20:16:08,120 INFO L226 Difference]: Without dead ends: 7519 [2021-07-13 20:16:08,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 3673.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:16:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2021-07-13 20:16:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 5176. [2021-07-13 20:16:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 1.991304347826087) internal successors, (10305), 5175 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-07-13 20:16:08,185 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-07-13 20:16:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:08,186 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-07-13 20:16:08,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-07-13 20:16:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:08,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:08,190 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:08,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:08,406 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:08,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1928347677, now seen corresponding path program 121 times [2021-07-13 20:16:08,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:08,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515818288] [2021-07-13 20:16:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:08,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:08,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515818288] [2021-07-13 20:16:08,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515818288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:08,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843691960] [2021-07-13 20:16:08,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:08,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:16:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:09,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:16:09,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:09,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:16:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:09,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843691960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:09,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:09,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-07-13 20:16:09,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284356245] [2021-07-13 20:16:09,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:16:09,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:16:09,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:16:09,384 INFO L87 Difference]: Start difference. First operand 5176 states and 10305 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:09,765 INFO L93 Difference]: Finished difference Result 6970 states and 13987 transitions. [2021-07-13 20:16:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:16:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:09,774 INFO L225 Difference]: With dead ends: 6970 [2021-07-13 20:16:09,774 INFO L226 Difference]: Without dead ends: 6925 [2021-07-13 20:16:09,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 765.2ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:16:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2021-07-13 20:16:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 5176. [2021-07-13 20:16:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 1.991304347826087) internal successors, (10305), 5175 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-07-13 20:16:09,866 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-07-13 20:16:09,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:09,866 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-07-13 20:16:09,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-07-13 20:16:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:16:09,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:09,871 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:10,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 20:16:10,085 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 945298195, now seen corresponding path program 122 times [2021-07-13 20:16:10,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:10,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739488658] [2021-07-13 20:16:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:10,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:10,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739488658] [2021-07-13 20:16:10,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739488658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:10,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474532611] [2021-07-13 20:16:10,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:10,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:10,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:10,437 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:16:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:10,865 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-07-13 20:16:10,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:16:10,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:10,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:10,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:10,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:145, output treesize:7 [2021-07-13 20:16:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:10,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474532611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:10,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:10,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2021-07-13 20:16:10,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53268271] [2021-07-13 20:16:10,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:16:10,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:16:10,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:16:10,880 INFO L87 Difference]: Start difference. First operand 5176 states and 10305 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:11,247 INFO L93 Difference]: Finished difference Result 6778 states and 13577 transitions. [2021-07-13 20:16:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:16:11,248 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:16:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:11,257 INFO L225 Difference]: With dead ends: 6778 [2021-07-13 20:16:11,257 INFO L226 Difference]: Without dead ends: 6763 [2021-07-13 20:16:11,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 638.3ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:16:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-07-13 20:16:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 5183. [2021-07-13 20:16:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 1.991509069857198) internal successors, (10320), 5182 states have internal predecessors, (10320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 10320 transitions. [2021-07-13 20:16:11,317 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 10320 transitions. Word has length 43 [2021-07-13 20:16:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:11,317 INFO L482 AbstractCegarLoop]: Abstraction has 5183 states and 10320 transitions. [2021-07-13 20:16:11,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 10320 transitions. [2021-07-13 20:16:11,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:16:11,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:11,321 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:11,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:11,537 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1365327806, now seen corresponding path program 123 times [2021-07-13 20:16:11,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:11,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805473739] [2021-07-13 20:16:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:16:11,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:11,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805473739] [2021-07-13 20:16:11,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805473739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:11,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743476424] [2021-07-13 20:16:11,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:11,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:16:11,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:11,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:16:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:16:11,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743476424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:11,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:11,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 20:16:11,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097562551] [2021-07-13 20:16:11,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:16:11,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:11,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:16:11,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:16:11,649 INFO L87 Difference]: Start difference. First operand 5183 states and 10320 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2021-07-13 20:16:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:11,682 INFO L93 Difference]: Finished difference Result 5616 states and 11180 transitions. [2021-07-13 20:16:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:16:11,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 44 [2021-07-13 20:16:11,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:11,688 INFO L225 Difference]: With dead ends: 5616 [2021-07-13 20:16:11,688 INFO L226 Difference]: Without dead ends: 5602 [2021-07-13 20:16:11,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:16:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2021-07-13 20:16:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 5194. [2021-07-13 20:16:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5193 states have (on average 1.9924898902368573) internal successors, (10347), 5193 states have internal predecessors, (10347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 10347 transitions. [2021-07-13 20:16:11,740 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 10347 transitions. Word has length 44 [2021-07-13 20:16:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:11,740 INFO L482 AbstractCegarLoop]: Abstraction has 5194 states and 10347 transitions. [2021-07-13 20:16:11,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2021-07-13 20:16:11,741 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 10347 transitions. [2021-07-13 20:16:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:16:11,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:11,745 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:11,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 20:16:11,946 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:11,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:11,946 INFO L82 PathProgramCache]: Analyzing trace with hash -930359854, now seen corresponding path program 124 times [2021-07-13 20:16:11,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:11,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945096913] [2021-07-13 20:16:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:11,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:11,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945096913] [2021-07-13 20:16:11,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945096913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:11,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572455676] [2021-07-13 20:16:11,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:12,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:12,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:16:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:12,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572455676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:12,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:12,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 20:16:12,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088782494] [2021-07-13 20:16:12,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:16:12,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:16:12,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:16:12,136 INFO L87 Difference]: Start difference. First operand 5194 states and 10347 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:12,180 INFO L93 Difference]: Finished difference Result 5677 states and 11327 transitions. [2021-07-13 20:16:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:16:12,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:16:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:12,186 INFO L225 Difference]: With dead ends: 5677 [2021-07-13 20:16:12,186 INFO L226 Difference]: Without dead ends: 5668 [2021-07-13 20:16:12,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:16:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2021-07-13 20:16:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5257. [2021-07-13 20:16:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5256 states have (on average 1.995433789954338) internal successors, (10488), 5256 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 10488 transitions. [2021-07-13 20:16:12,245 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 10488 transitions. Word has length 44 [2021-07-13 20:16:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:12,246 INFO L482 AbstractCegarLoop]: Abstraction has 5257 states and 10488 transitions. [2021-07-13 20:16:12,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 10488 transitions. [2021-07-13 20:16:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 20:16:12,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:12,250 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:12,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:16:12,465 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash -748801414, now seen corresponding path program 125 times [2021-07-13 20:16:12,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:12,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47843254] [2021-07-13 20:16:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:12,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:12,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47843254] [2021-07-13 20:16:12,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47843254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:12,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161605102] [2021-07-13 20:16:12,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:12,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:16:12,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:12,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:16:12,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:13,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:13,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:13,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:16:13,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:13,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:13,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:13,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:16:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:13,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161605102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:13,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:13,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 27 [2021-07-13 20:16:13,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438933815] [2021-07-13 20:16:13,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:16:13,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:16:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:16:13,332 INFO L87 Difference]: Start difference. First operand 5257 states and 10488 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:15,078 INFO L93 Difference]: Finished difference Result 8586 states and 17459 transitions. [2021-07-13 20:16:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:16:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 20:16:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:15,088 INFO L225 Difference]: With dead ends: 8586 [2021-07-13 20:16:15,088 INFO L226 Difference]: Without dead ends: 8466 [2021-07-13 20:16:15,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1822.9ms TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:16:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-07-13 20:16:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 5282. [2021-07-13 20:16:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 1.996212838477561) internal successors, (10542), 5281 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 10542 transitions. [2021-07-13 20:16:15,153 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 10542 transitions. Word has length 46 [2021-07-13 20:16:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:15,153 INFO L482 AbstractCegarLoop]: Abstraction has 5282 states and 10542 transitions. [2021-07-13 20:16:15,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 10542 transitions. [2021-07-13 20:16:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:15,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:15,157 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:15,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:15,373 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash 91309083, now seen corresponding path program 126 times [2021-07-13 20:16:15,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:15,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543904209] [2021-07-13 20:16:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:15,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:15,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543904209] [2021-07-13 20:16:15,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543904209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:15,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189480783] [2021-07-13 20:16:15,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:15,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:16:15,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:15,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:16:15,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:16,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:16,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:16,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:16,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:16,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:16:16,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:16,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:16,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:16,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:16:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:16,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189480783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:16,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:16,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-13 20:16:16,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551190194] [2021-07-13 20:16:16,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:16,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:16,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:16,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:16,710 INFO L87 Difference]: Start difference. First operand 5282 states and 10542 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:17,468 INFO L93 Difference]: Finished difference Result 9697 states and 19645 transitions. [2021-07-13 20:16:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:16:17,469 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:17,482 INFO L225 Difference]: With dead ends: 9697 [2021-07-13 20:16:17,483 INFO L226 Difference]: Without dead ends: 9575 [2021-07-13 20:16:17,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1076.4ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9575 states. [2021-07-13 20:16:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9575 to 5303. [2021-07-13 20:16:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5303 states, 5302 states have (on average 1.99622783855149) internal successors, (10584), 5302 states have internal predecessors, (10584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5303 states to 5303 states and 10584 transitions. [2021-07-13 20:16:17,564 INFO L78 Accepts]: Start accepts. Automaton has 5303 states and 10584 transitions. Word has length 47 [2021-07-13 20:16:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:17,564 INFO L482 AbstractCegarLoop]: Abstraction has 5303 states and 10584 transitions. [2021-07-13 20:16:17,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 5303 states and 10584 transitions. [2021-07-13 20:16:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:17,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:17,569 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:17,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:17,781 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash 590250667, now seen corresponding path program 127 times [2021-07-13 20:16:17,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:17,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699927511] [2021-07-13 20:16:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:18,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:18,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699927511] [2021-07-13 20:16:18,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699927511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:18,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099253359] [2021-07-13 20:16:18,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:18,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:16:18,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:19,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:19,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:19,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:19,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 60 [2021-07-13 20:16:19,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:19,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:19,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:19,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-07-13 20:16:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:19,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099253359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:19,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:19,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-13 20:16:19,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885747365] [2021-07-13 20:16:19,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:19,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:19,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:19,086 INFO L87 Difference]: Start difference. First operand 5303 states and 10584 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:19,807 INFO L93 Difference]: Finished difference Result 9274 states and 18836 transitions. [2021-07-13 20:16:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:16:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:19,822 INFO L225 Difference]: With dead ends: 9274 [2021-07-13 20:16:19,822 INFO L226 Difference]: Without dead ends: 9152 [2021-07-13 20:16:19,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1062.5ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2021-07-13 20:16:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 5363. [2021-07-13 20:16:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5362 states have (on average 1.9962700484893696) internal successors, (10704), 5362 states have internal predecessors, (10704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 10704 transitions. [2021-07-13 20:16:19,896 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 10704 transitions. Word has length 47 [2021-07-13 20:16:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:19,896 INFO L482 AbstractCegarLoop]: Abstraction has 5363 states and 10704 transitions. [2021-07-13 20:16:19,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 10704 transitions. [2021-07-13 20:16:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:19,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:19,901 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:20,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:20,118 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash -533528613, now seen corresponding path program 128 times [2021-07-13 20:16:20,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:20,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150297383] [2021-07-13 20:16:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:20,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:20,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150297383] [2021-07-13 20:16:20,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150297383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:20,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529893130] [2021-07-13 20:16:20,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:20,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:20,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:20,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:16:20,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:21,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:21,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:21,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:21,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:21,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:21,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,488 INFO L244 Elim1Store]: Index analysis took 101 ms [2021-07-13 20:16:21,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:16:21,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:21,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:21,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:21,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:16:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:21,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529893130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:21,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:21,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-07-13 20:16:21,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011541611] [2021-07-13 20:16:21,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:16:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:21,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:16:21,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:16:21,522 INFO L87 Difference]: Start difference. First operand 5363 states and 10704 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:22,316 INFO L93 Difference]: Finished difference Result 9393 states and 18931 transitions. [2021-07-13 20:16:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:16:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:22,330 INFO L225 Difference]: With dead ends: 9393 [2021-07-13 20:16:22,331 INFO L226 Difference]: Without dead ends: 9327 [2021-07-13 20:16:22,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1068.7ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:16:22,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-07-13 20:16:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 5330. [2021-07-13 20:16:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5329 states have (on average 1.9941827735034716) internal successors, (10627), 5329 states have internal predecessors, (10627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10627 transitions. [2021-07-13 20:16:22,412 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10627 transitions. Word has length 47 [2021-07-13 20:16:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:22,412 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10627 transitions. [2021-07-13 20:16:22,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10627 transitions. [2021-07-13 20:16:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:22,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:22,417 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:22,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:22,634 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:22,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:22,634 INFO L82 PathProgramCache]: Analyzing trace with hash 499962331, now seen corresponding path program 129 times [2021-07-13 20:16:22,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:22,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150024857] [2021-07-13 20:16:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:22,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150024857] [2021-07-13 20:16:22,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150024857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064166152] [2021-07-13 20:16:22,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:23,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 20:16:23,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:23,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:16:23,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:24,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:24,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:24,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:24,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:24,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:24,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:16:24,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:24,162 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-07-13 20:16:24,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:24,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-07-13 20:16:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:24,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064166152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:24,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:24,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-13 20:16:24,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276291491] [2021-07-13 20:16:24,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:24,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:24,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:24,174 INFO L87 Difference]: Start difference. First operand 5330 states and 10627 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:27,257 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-07-13 20:16:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:27,998 INFO L93 Difference]: Finished difference Result 9678 states and 19547 transitions. [2021-07-13 20:16:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:16:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:28,012 INFO L225 Difference]: With dead ends: 9678 [2021-07-13 20:16:28,012 INFO L226 Difference]: Without dead ends: 9218 [2021-07-13 20:16:28,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3626.4ms TimeCoverageRelationStatistics Valid=330, Invalid=3830, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:16:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-07-13 20:16:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 5507. [2021-07-13 20:16:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 1.995277878677806) internal successors, (10986), 5506 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 10986 transitions. [2021-07-13 20:16:28,092 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 10986 transitions. Word has length 47 [2021-07-13 20:16:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:28,092 INFO L482 AbstractCegarLoop]: Abstraction has 5507 states and 10986 transitions. [2021-07-13 20:16:28,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 10986 transitions. [2021-07-13 20:16:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:28,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:28,098 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:28,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 20:16:28,314 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1480573845, now seen corresponding path program 130 times [2021-07-13 20:16:28,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:28,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564772846] [2021-07-13 20:16:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:28,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:28,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564772846] [2021-07-13 20:16:28,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564772846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:28,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780418957] [2021-07-13 20:16:28,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:28,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:28,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:28,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:16:28,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:29,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:29,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:29,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:29,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:29,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:29,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:29,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:29,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 60 [2021-07-13 20:16:29,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:29,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:29,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:29,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-07-13 20:16:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:29,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780418957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:29,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:29,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-13 20:16:29,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384354543] [2021-07-13 20:16:29,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:29,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:29,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:29,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:29,664 INFO L87 Difference]: Start difference. First operand 5507 states and 10986 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:30,187 INFO L93 Difference]: Finished difference Result 8590 states and 17250 transitions. [2021-07-13 20:16:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:16:30,187 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:30,200 INFO L225 Difference]: With dead ends: 8590 [2021-07-13 20:16:30,200 INFO L226 Difference]: Without dead ends: 8567 [2021-07-13 20:16:30,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1054.0ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-07-13 20:16:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 5513. [2021-07-13 20:16:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 1.9954644412191582) internal successors, (10999), 5512 states have internal predecessors, (10999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 10999 transitions. [2021-07-13 20:16:30,278 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 10999 transitions. Word has length 47 [2021-07-13 20:16:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:30,278 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 10999 transitions. [2021-07-13 20:16:30,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 10999 transitions. [2021-07-13 20:16:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:30,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:30,284 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:30,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 20:16:30,491 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1502990453, now seen corresponding path program 131 times [2021-07-13 20:16:30,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:30,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951609548] [2021-07-13 20:16:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:30,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:30,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951609548] [2021-07-13 20:16:30,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951609548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:30,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903968956] [2021-07-13 20:16:30,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:30,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:16:30,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:30,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:16:30,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:31,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:31,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:31,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:16:31,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:31,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:31,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:31,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:16:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:31,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903968956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:31,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:31,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-13 20:16:31,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045022939] [2021-07-13 20:16:31,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:31,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:31,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:31,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:31,785 INFO L87 Difference]: Start difference. First operand 5513 states and 10999 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:32,528 INFO L93 Difference]: Finished difference Result 11538 states and 23485 transitions. [2021-07-13 20:16:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:16:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:32,542 INFO L225 Difference]: With dead ends: 11538 [2021-07-13 20:16:32,543 INFO L226 Difference]: Without dead ends: 11355 [2021-07-13 20:16:32,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1052.8ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-07-13 20:16:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 5330. [2021-07-13 20:16:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5329 states have (on average 1.99962469506474) internal successors, (10656), 5329 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10656 transitions. [2021-07-13 20:16:32,621 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10656 transitions. Word has length 47 [2021-07-13 20:16:32,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:32,621 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10656 transitions. [2021-07-13 20:16:32,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10656 transitions. [2021-07-13 20:16:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:32,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:32,626 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:32,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 20:16:32,831 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash -158396757, now seen corresponding path program 132 times [2021-07-13 20:16:32,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:32,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750629723] [2021-07-13 20:16:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:33,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:33,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750629723] [2021-07-13 20:16:33,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750629723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:33,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377743937] [2021-07-13 20:16:33,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:33,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 20:16:33,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:33,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:16:33,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:33,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:33,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:33,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:33,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:33,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:33,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:33,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:33,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:16:33,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:33,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:33,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:33,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:16:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:33,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377743937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:33,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:33,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-07-13 20:16:33,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030511648] [2021-07-13 20:16:33,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:16:33,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:16:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:16:33,982 INFO L87 Difference]: Start difference. First operand 5330 states and 10656 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:34,975 INFO L93 Difference]: Finished difference Result 6335 states and 12694 transitions. [2021-07-13 20:16:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:16:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:34,982 INFO L225 Difference]: With dead ends: 6335 [2021-07-13 20:16:34,982 INFO L226 Difference]: Without dead ends: 6300 [2021-07-13 20:16:34,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1277.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:16:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-07-13 20:16:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4817. [2021-07-13 20:16:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4817 states, 4816 states have (on average 1.995016611295681) internal successors, (9608), 4816 states have internal predecessors, (9608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4817 states to 4817 states and 9608 transitions. [2021-07-13 20:16:35,037 INFO L78 Accepts]: Start accepts. Automaton has 4817 states and 9608 transitions. Word has length 47 [2021-07-13 20:16:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:35,037 INFO L482 AbstractCegarLoop]: Abstraction has 4817 states and 9608 transitions. [2021-07-13 20:16:35,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4817 states and 9608 transitions. [2021-07-13 20:16:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:35,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:35,042 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:35,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:35,249 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1004048869, now seen corresponding path program 133 times [2021-07-13 20:16:35,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:35,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332858997] [2021-07-13 20:16:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:35,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:35,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332858997] [2021-07-13 20:16:35,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332858997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:35,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159766328] [2021-07-13 20:16:35,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:35,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:16:35,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:36,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:36,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:36,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:36,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:36,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:36,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:16:36,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:36,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:36,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:36,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:16:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:36,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159766328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:36,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:36,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-13 20:16:36,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892230463] [2021-07-13 20:16:36,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:36,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:36,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:36,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:36,528 INFO L87 Difference]: Start difference. First operand 4817 states and 9608 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:37,066 INFO L93 Difference]: Finished difference Result 9532 states and 19425 transitions. [2021-07-13 20:16:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:16:37,067 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:37,077 INFO L225 Difference]: With dead ends: 9532 [2021-07-13 20:16:37,077 INFO L226 Difference]: Without dead ends: 9364 [2021-07-13 20:16:37,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1044.4ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2021-07-13 20:16:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 4844. [2021-07-13 20:16:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4844 states, 4843 states have (on average 1.993392525294239) internal successors, (9654), 4843 states have internal predecessors, (9654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4844 states to 4844 states and 9654 transitions. [2021-07-13 20:16:37,143 INFO L78 Accepts]: Start accepts. Automaton has 4844 states and 9654 transitions. Word has length 47 [2021-07-13 20:16:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:37,144 INFO L482 AbstractCegarLoop]: Abstraction has 4844 states and 9654 transitions. [2021-07-13 20:16:37,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4844 states and 9654 transitions. [2021-07-13 20:16:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:37,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:37,148 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:37,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 20:16:37,364 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:37,364 INFO L82 PathProgramCache]: Analyzing trace with hash -248685093, now seen corresponding path program 134 times [2021-07-13 20:16:37,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:37,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139667424] [2021-07-13 20:16:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:37,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:37,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139667424] [2021-07-13 20:16:37,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139667424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:37,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384462531] [2021-07-13 20:16:37,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:37,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:37,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:37,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:16:37,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:38,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:38,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:38,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:38,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:38,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:38,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:38,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:16:38,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:38,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:38,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:38,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:16:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:38,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384462531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:38,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:38,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-07-13 20:16:38,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341784520] [2021-07-13 20:16:38,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:16:38,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:16:38,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:16:38,523 INFO L87 Difference]: Start difference. First operand 4844 states and 9654 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:39,542 INFO L93 Difference]: Finished difference Result 6513 states and 13009 transitions. [2021-07-13 20:16:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:16:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:39,549 INFO L225 Difference]: With dead ends: 6513 [2021-07-13 20:16:39,550 INFO L226 Difference]: Without dead ends: 6115 [2021-07-13 20:16:39,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1356.7ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:16:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2021-07-13 20:16:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 4875. [2021-07-13 20:16:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.9883052933935166) internal successors, (9691), 4874 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 9691 transitions. [2021-07-13 20:16:39,606 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 9691 transitions. Word has length 47 [2021-07-13 20:16:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:39,606 INFO L482 AbstractCegarLoop]: Abstraction has 4875 states and 9691 transitions. [2021-07-13 20:16:39,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 9691 transitions. [2021-07-13 20:16:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:39,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:39,610 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:39,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:39,821 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:39,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2127828149, now seen corresponding path program 135 times [2021-07-13 20:16:39,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:39,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057318720] [2021-07-13 20:16:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:40,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057318720] [2021-07-13 20:16:40,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057318720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969982988] [2021-07-13 20:16:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:40,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 20:16:40,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:40,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-13 20:16:40,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:20,359 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:18:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:20,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:20,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:20,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:20,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:20,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:20,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:20,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 60 [2021-07-13 20:18:20,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:20,499 INFO L628 ElimStorePlain]: treesize reduction 3, result has 92.1 percent of original size [2021-07-13 20:18:20,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:20,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:181, output treesize:7 [2021-07-13 20:18:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 136 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:20,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969982988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:20,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:20,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-07-13 20:18:20,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470546290] [2021-07-13 20:18:20,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:18:20,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:20,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:18:20,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1123, Unknown=26, NotChecked=0, Total=1260 [2021-07-13 20:18:20,511 INFO L87 Difference]: Start difference. First operand 4875 states and 9691 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:33,303 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-07-13 20:19:39,084 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-07-13 20:20:28,288 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-13 20:20:53,800 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-07-13 20:20:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:20:54,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:54,001 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:847) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:761) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-07-13 20:20:54,007 INFO L168 Benchmark]: Toolchain (without parser) took 819850.26 ms. Allocated memory was 127.9 MB in the beginning and 986.7 MB in the end (delta: 858.8 MB). Free memory was 107.0 MB in the beginning and 720.2 MB in the end (delta: -613.2 MB). Peak memory consumption was 247.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:20:54,007 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 127.9 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:20:54,007 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.76 ms. Allocated memory is still 127.9 MB. Free memory was 107.0 MB in the beginning and 105.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:20:54,007 INFO L168 Benchmark]: Boogie Preprocessor took 13.51 ms. Allocated memory is still 127.9 MB. Free memory was 105.6 MB in the beginning and 104.7 MB in the end (delta: 892.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:20:54,007 INFO L168 Benchmark]: RCFGBuilder took 209.81 ms. Allocated memory is still 127.9 MB. Free memory was 104.6 MB in the beginning and 92.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:20:54,007 INFO L168 Benchmark]: TraceAbstraction took 819595.89 ms. Allocated memory was 127.9 MB in the beginning and 986.7 MB in the end (delta: 858.8 MB). Free memory was 92.0 MB in the beginning and 720.2 MB in the end (delta: -628.2 MB). Peak memory consumption was 232.3 MB. Max. memory is 8.0 GB. [2021-07-13 20:20:54,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 127.9 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.76 ms. Allocated memory is still 127.9 MB. Free memory was 107.0 MB in the beginning and 105.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.51 ms. Allocated memory is still 127.9 MB. Free memory was 105.6 MB in the beginning and 104.7 MB in the end (delta: 892.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 209.81 ms. Allocated memory is still 127.9 MB. Free memory was 104.6 MB in the beginning and 92.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 819595.89 ms. Allocated memory was 127.9 MB in the beginning and 986.7 MB in the end (delta: 858.8 MB). Free memory was 92.0 MB in the beginning and 720.2 MB in the end (delta: -628.2 MB). Peak memory consumption was 232.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...