/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:41:41,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:41:41,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:41:41,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:41:41,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:41:41,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:41:41,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:41:41,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:41:41,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:41:41,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:41:41,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:41:41,930 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:41:41,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:41:41,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:41:41,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:41:41,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:41:41,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:41:41,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:41:41,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:41:41,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:41:41,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:41:41,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:41:41,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:41:41,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:41:41,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:41:41,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:41:41,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:41:41,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:41:41,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:41:41,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:41:41,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:41:41,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:41:41,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:41:41,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:41:41,933 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:41:41,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:41:41,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:41:42,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:41:42,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:41:42,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:41:42,272 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:41:42,273 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:41:42,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2021-06-05 22:41:42,285 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2021-06-05 22:41:42,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:41:42,312 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:41:42,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:41:42,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:41:42,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:41:42,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... [2021-06-05 22:41:42,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... [2021-06-05 22:41:42,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:41:42,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:41:42,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:41:42,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:41:42,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... [2021-06-05 22:41:42,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... [2021-06-05 22:41:42,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... [2021-06-05 22:41:42,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... [2021-06-05 22:41:42,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... [2021-06-05 22:41:42,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... [2021-06-05 22:41:42,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... [2021-06-05 22:41:42,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:41:42,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:41:42,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:41:42,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:41:42,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:41:42,436 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:41:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:41:42,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:41:42,437 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:41:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:41:42,438 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:41:42,438 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:41:42,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:41:42,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:41:42,439 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:41:42,668 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:41:42,668 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 22:41:42,669 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 22:41:42,670 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:41:42 BoogieIcfgContainer [2021-06-05 22:41:42,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:41:42,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:41:42,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:41:42,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:41:42,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:41:42" (1/2) ... [2021-06-05 22:41:42,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793075b6 and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:41:42, skipping insertion in model container [2021-06-05 22:41:42,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:41:42" (2/2) ... [2021-06-05 22:41:42,677 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2021-06-05 22:41:42,701 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:41:42,702 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:41:42,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:41:42,702 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:41:42,727 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 22:41:42,745 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 22:41:42,760 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:41:42,760 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:41:42,760 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:41:42,761 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:41:42,774 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:41:42,774 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:41:42,774 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:41:42,774 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:41:42,782 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 22 transitions, 60 flow [2021-06-05 22:41:42,790 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 22:41:42,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:42,798 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:42,798 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash 10984786, now seen corresponding path program 1 times [2021-06-05 22:41:42,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:42,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100542427] [2021-06-05 22:41:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:42,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:42,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100542427] [2021-06-05 22:41:42,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100542427] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:41:42,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:41:42,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:41:42,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622250502] [2021-06-05 22:41:42,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:41:42,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:42,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:41:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:41:42,988 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-06-05 22:41:43,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:43,007 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2021-06-05 22:41:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:41:43,009 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 [2021-06-05 22:41:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:43,017 INFO L225 Difference]: With dead ends: 54 [2021-06-05 22:41:43,017 INFO L226 Difference]: Without dead ends: 42 [2021-06-05 22:41:43,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:41:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-05 22:41:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-06-05 22:41:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 70 transitions. [2021-06-05 22:41:43,049 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 70 transitions. Word has length 11 [2021-06-05 22:41:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:43,050 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 70 transitions. [2021-06-05 22:41:43,050 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) [2021-06-05 22:41:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 70 transitions. [2021-06-05 22:41:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:41:43,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:43,051 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:43,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:41:43,052 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:43,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:43,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1844506957, now seen corresponding path program 1 times [2021-06-05 22:41:43,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:43,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212174967] [2021-06-05 22:41:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:43,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:43,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212174967] [2021-06-05 22:41:43,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212174967] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:41:43,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:41:43,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:41:43,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627903688] [2021-06-05 22:41:43,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:41:43,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:41:43,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:41:43,079 INFO L87 Difference]: Start difference. First operand 36 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:43,087 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2021-06-05 22:41:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:41:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:41:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:43,089 INFO L225 Difference]: With dead ends: 37 [2021-06-05 22:41:43,089 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 22:41:43,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:41:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 22:41:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 22:41:43,094 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) [2021-06-05 22:41:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-05 22:41:43,095 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 13 [2021-06-05 22:41:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:43,095 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-05 22:41:43,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,095 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-05 22:41:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:41:43,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:43,096 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:43,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:41:43,097 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash 244145385, now seen corresponding path program 1 times [2021-06-05 22:41:43,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:43,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519164061] [2021-06-05 22:41:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:43,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:43,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519164061] [2021-06-05 22:41:43,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519164061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:43,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501339818] [2021-06-05 22:41:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:43,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:41:43,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:43,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:41:43,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:43,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:43,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:43,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 22:41:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:43,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501339818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:43,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:43,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:41:43,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881075978] [2021-06-05 22:41:43,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:41:43,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:43,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:41:43,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:41:43,421 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:43,526 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-06-05 22:41:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:41:43,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:41:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:43,528 INFO L225 Difference]: With dead ends: 67 [2021-06-05 22:41:43,528 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 22:41:43,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:41:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 22:41:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-06-05 22:41:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2021-06-05 22:41:43,535 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 16 [2021-06-05 22:41:43,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:43,536 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2021-06-05 22:41:43,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2021-06-05 22:41:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:41:43,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:43,537 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:43,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 22:41:43,738 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:43,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1749319479, now seen corresponding path program 1 times [2021-06-05 22:41:43,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:43,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253176659] [2021-06-05 22:41:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:43,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:43,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253176659] [2021-06-05 22:41:43,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253176659] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:41:43,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:41:43,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:41:43,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994471835] [2021-06-05 22:41:43,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:41:43,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:43,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:41:43,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:41:43,754 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:43,762 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-06-05 22:41:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:41:43,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:41:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:43,764 INFO L225 Difference]: With dead ends: 52 [2021-06-05 22:41:43,764 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 22:41:43,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:41:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 22:41:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-06-05 22:41:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-06-05 22:41:43,771 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 16 [2021-06-05 22:41:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:43,772 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-06-05 22:41:43,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-06-05 22:41:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:41:43,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:43,773 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:43,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:41:43,773 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1115470710, now seen corresponding path program 2 times [2021-06-05 22:41:43,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:43,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990225440] [2021-06-05 22:41:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:43,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:43,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990225440] [2021-06-05 22:41:43,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990225440] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:41:43,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:41:43,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:41:43,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151735745] [2021-06-05 22:41:43,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:41:43,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:41:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:41:43,824 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:43,854 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-06-05 22:41:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:41:43,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:41:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:43,861 INFO L225 Difference]: With dead ends: 116 [2021-06-05 22:41:43,861 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 22:41:43,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:41:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 22:41:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-06-05 22:41:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-06-05 22:41:43,874 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 18 [2021-06-05 22:41:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:43,875 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-06-05 22:41:43,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-06-05 22:41:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:41:43,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:43,881 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:43,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:41:43,881 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:43,882 INFO L82 PathProgramCache]: Analyzing trace with hash -686636110, now seen corresponding path program 3 times [2021-06-05 22:41:43,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:43,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437416754] [2021-06-05 22:41:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:43,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:43,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437416754] [2021-06-05 22:41:43,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437416754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:43,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205605153] [2021-06-05 22:41:43,906 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 [2021-06-05 22:41:43,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:41:43,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 22:41:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:43,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205605153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:43,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:43,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:41:43,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575598122] [2021-06-05 22:41:43,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:41:43,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:43,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:41:43,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:41:43,977 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:43,996 INFO L93 Difference]: Finished difference Result 118 states and 228 transitions. [2021-06-05 22:41:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:41:44,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:41:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:44,002 INFO L225 Difference]: With dead ends: 118 [2021-06-05 22:41:44,002 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 22:41:44,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:41:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 22:41:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2021-06-05 22:41:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2021-06-05 22:41:44,013 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 21 [2021-06-05 22:41:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:44,013 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2021-06-05 22:41:44,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2021-06-05 22:41:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:41:44,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:44,015 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:44,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:44,216 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:44,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1614866322, now seen corresponding path program 1 times [2021-06-05 22:41:44,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:44,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041533025] [2021-06-05 22:41:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:44,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:44,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041533025] [2021-06-05 22:41:44,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041533025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:44,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261646497] [2021-06-05 22:41:44,432 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 [2021-06-05 22:41:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:41:44,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:44,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:44,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:44,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:44,777 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 34 treesize of output 18 [2021-06-05 22:41:44,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:44,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:44,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:44,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-06-05 22:41:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:44,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261646497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:44,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:44,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:41:44,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087929915] [2021-06-05 22:41:44,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:41:44,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:44,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:41:44,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:41:44,832 INFO L87 Difference]: Start difference. First operand 104 states and 213 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-06-05 22:41:44,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:44,912 INFO L93 Difference]: Finished difference Result 175 states and 364 transitions. [2021-06-05 22:41:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:41:44,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21 [2021-06-05 22:41:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:44,914 INFO L225 Difference]: With dead ends: 175 [2021-06-05 22:41:44,914 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 22:41:44,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:41:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 22:41:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2021-06-05 22:41:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 118 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 242 transitions. [2021-06-05 22:41:44,941 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 242 transitions. Word has length 21 [2021-06-05 22:41:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:44,942 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 242 transitions. [2021-06-05 22:41:44,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-06-05 22:41:44,942 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 242 transitions. [2021-06-05 22:41:44,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:41:44,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:44,943 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:45,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:45,160 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash 466490442, now seen corresponding path program 2 times [2021-06-05 22:41:45,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:45,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365093667] [2021-06-05 22:41:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:45,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365093667] [2021-06-05 22:41:45,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365093667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:45,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759686923] [2021-06-05 22:41:45,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:45,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:45,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:45,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:41:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:45,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:45,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:45,515 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 34 treesize of output 18 [2021-06-05 22:41:45,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:45,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:45,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:45,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-06-05 22:41:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:45,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759686923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:45,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:45,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:41:45,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593550251] [2021-06-05 22:41:45,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:41:45,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:45,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:41:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:41:45,545 INFO L87 Difference]: Start difference. First operand 119 states and 242 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-06-05 22:41:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:45,645 INFO L93 Difference]: Finished difference Result 209 states and 432 transitions. [2021-06-05 22:41:45,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:41:45,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21 [2021-06-05 22:41:45,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:45,649 INFO L225 Difference]: With dead ends: 209 [2021-06-05 22:41:45,649 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 22:41:45,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:41:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 22:41:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 123. [2021-06-05 22:41:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 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) [2021-06-05 22:41:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 249 transitions. [2021-06-05 22:41:45,669 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 249 transitions. Word has length 21 [2021-06-05 22:41:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:45,669 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 249 transitions. [2021-06-05 22:41:45,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-06-05 22:41:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 249 transitions. [2021-06-05 22:41:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:41:45,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:45,670 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:45,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:45,883 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash -870312972, now seen corresponding path program 3 times [2021-06-05 22:41:45,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:45,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316088329] [2021-06-05 22:41:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:46,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:46,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316088329] [2021-06-05 22:41:46,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316088329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:46,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337796306] [2021-06-05 22:41:46,030 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 [2021-06-05 22:41:46,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:41:46,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:46,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:41:46,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:46,206 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:41:46,207 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 34 treesize of output 18 [2021-06-05 22:41:46,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:46,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:46,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:46,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 22:41:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:46,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337796306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:46,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:46,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:41:46,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624146241] [2021-06-05 22:41:46,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:41:46,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:46,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:41:46,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:41:46,232 INFO L87 Difference]: Start difference. First operand 123 states and 249 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-05 22:41:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:46,338 INFO L93 Difference]: Finished difference Result 180 states and 370 transitions. [2021-06-05 22:41:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:41:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 22:41:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:46,340 INFO L225 Difference]: With dead ends: 180 [2021-06-05 22:41:46,340 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 22:41:46,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:41:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 22:41:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2021-06-05 22:41:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.046511627906977) internal successors, (264), 129 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 264 transitions. [2021-06-05 22:41:46,347 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 264 transitions. Word has length 21 [2021-06-05 22:41:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:46,347 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 264 transitions. [2021-06-05 22:41:46,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-05 22:41:46,347 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 264 transitions. [2021-06-05 22:41:46,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:46,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:46,349 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:46,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:46,562 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:46,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1631872213, now seen corresponding path program 4 times [2021-06-05 22:41:46,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:46,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139634667] [2021-06-05 22:41:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:46,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:46,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139634667] [2021-06-05 22:41:46,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139634667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:46,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909013507] [2021-06-05 22:41:46,601 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 [2021-06-05 22:41:46,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:46,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:41:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:46,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909013507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:46,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:46,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 22:41:46,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347239186] [2021-06-05 22:41:46,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:41:46,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:46,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:41:46,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:41:46,698 INFO L87 Difference]: Start difference. First operand 130 states and 264 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:46,718 INFO L93 Difference]: Finished difference Result 267 states and 530 transitions. [2021-06-05 22:41:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:41:46,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:46,720 INFO L225 Difference]: With dead ends: 267 [2021-06-05 22:41:46,720 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 22:41:46,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:41:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 22:41:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 163. [2021-06-05 22:41:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.0925925925925926) internal successors, (339), 162 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 339 transitions. [2021-06-05 22:41:46,727 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 339 transitions. Word has length 23 [2021-06-05 22:41:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:46,727 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 339 transitions. [2021-06-05 22:41:46,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 339 transitions. [2021-06-05 22:41:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:46,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:46,729 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:46,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:46,949 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:46,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:46,950 INFO L82 PathProgramCache]: Analyzing trace with hash 979925673, now seen corresponding path program 5 times [2021-06-05 22:41:46,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:46,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649389046] [2021-06-05 22:41:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:41:47,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:47,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649389046] [2021-06-05 22:41:47,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649389046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:47,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828157285] [2021-06-05 22:41:47,136 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 [2021-06-05 22:41:47,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:41:47,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:47,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:47,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:47,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:47,420 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 53 treesize of output 25 [2021-06-05 22:41:47,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:47,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:47,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:47,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:47,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828157285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:47,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:47,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:41:47,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309916253] [2021-06-05 22:41:47,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:41:47,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:47,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:41:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:41:47,447 INFO L87 Difference]: Start difference. First operand 163 states and 339 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) [2021-06-05 22:41:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:47,649 INFO L93 Difference]: Finished difference Result 337 states and 691 transitions. [2021-06-05 22:41:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:41:47,649 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 26 [2021-06-05 22:41:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:47,651 INFO L225 Difference]: With dead ends: 337 [2021-06-05 22:41:47,651 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 22:41:47,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 22:41:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 202. [2021-06-05 22:41:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0696517412935322) internal successors, (416), 201 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 416 transitions. [2021-06-05 22:41:47,657 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 416 transitions. Word has length 26 [2021-06-05 22:41:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:47,657 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 416 transitions. [2021-06-05 22:41:47,657 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) [2021-06-05 22:41:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 416 transitions. [2021-06-05 22:41:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:47,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:47,658 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:47,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:47,873 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash -494046431, now seen corresponding path program 6 times [2021-06-05 22:41:47,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:47,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319460289] [2021-06-05 22:41:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:48,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:48,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319460289] [2021-06-05 22:41:48,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319460289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:48,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391532657] [2021-06-05 22:41:48,071 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 [2021-06-05 22:41:48,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:41:48,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:48,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:48,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:48,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:48,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:48,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:48,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:48,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:48,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:48,381 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 53 treesize of output 25 [2021-06-05 22:41:48,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:48,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:48,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:48,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:48,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391532657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:48,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:48,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:41:48,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127684317] [2021-06-05 22:41:48,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:48,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:48,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:48,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:48,414 INFO L87 Difference]: Start difference. First operand 202 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:48,593 INFO L93 Difference]: Finished difference Result 375 states and 785 transitions. [2021-06-05 22:41:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:41:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-05 22:41:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:48,595 INFO L225 Difference]: With dead ends: 375 [2021-06-05 22:41:48,595 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:41:48,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:41:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 214. [2021-06-05 22:41:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.056338028169014) internal successors, (438), 213 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 438 transitions. [2021-06-05 22:41:48,602 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 438 transitions. Word has length 26 [2021-06-05 22:41:48,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:48,602 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 438 transitions. [2021-06-05 22:41:48,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 438 transitions. [2021-06-05 22:41:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:48,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:48,603 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:48,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 22:41:48,826 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:48,826 INFO L82 PathProgramCache]: Analyzing trace with hash 960569099, now seen corresponding path program 7 times [2021-06-05 22:41:48,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:48,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490179905] [2021-06-05 22:41:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:49,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:49,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490179905] [2021-06-05 22:41:49,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490179905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:49,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105587895] [2021-06-05 22:41:49,028 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 [2021-06-05 22:41:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:49,060 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:49,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:49,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:49,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:49,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:49,315 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 53 treesize of output 25 [2021-06-05 22:41:49,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:49,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:49,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:49,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:49,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105587895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:49,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:49,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:41:49,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952247694] [2021-06-05 22:41:49,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:49,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:49,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:49,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:49,352 INFO L87 Difference]: Start difference. First operand 214 states and 438 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:49,564 INFO L93 Difference]: Finished difference Result 372 states and 766 transitions. [2021-06-05 22:41:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:41:49,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-05 22:41:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:49,567 INFO L225 Difference]: With dead ends: 372 [2021-06-05 22:41:49,567 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 22:41:49,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 22:41:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 217. [2021-06-05 22:41:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0555555555555554) internal successors, (444), 216 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 444 transitions. [2021-06-05 22:41:49,573 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 444 transitions. Word has length 26 [2021-06-05 22:41:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:49,574 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 444 transitions. [2021-06-05 22:41:49,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 444 transitions. [2021-06-05 22:41:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:49,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:49,575 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:49,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:49,789 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash -30244623, now seen corresponding path program 8 times [2021-06-05 22:41:49,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:49,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840742119] [2021-06-05 22:41:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:41:49,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840742119] [2021-06-05 22:41:49,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840742119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060789614] [2021-06-05 22:41:49,979 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 [2021-06-05 22:41:50,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:50,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:50,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:50,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:50,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:50,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:50,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:50,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:50,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:50,293 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 53 treesize of output 25 [2021-06-05 22:41:50,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:50,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:50,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:50,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:50,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060789614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:50,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:50,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:41:50,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024481626] [2021-06-05 22:41:50,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:41:50,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:50,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:41:50,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:41:50,317 INFO L87 Difference]: Start difference. First operand 217 states and 444 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) [2021-06-05 22:41:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:50,488 INFO L93 Difference]: Finished difference Result 548 states and 1112 transitions. [2021-06-05 22:41:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:41:50,489 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 26 [2021-06-05 22:41:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:50,491 INFO L225 Difference]: With dead ends: 548 [2021-06-05 22:41:50,491 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 22:41:50,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 22:41:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 247. [2021-06-05 22:41:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.024390243902439) internal successors, (498), 246 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 498 transitions. [2021-06-05 22:41:50,499 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 498 transitions. Word has length 26 [2021-06-05 22:41:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:50,499 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 498 transitions. [2021-06-05 22:41:50,499 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) [2021-06-05 22:41:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 498 transitions. [2021-06-05 22:41:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:50,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:50,500 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:50,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:50,713 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1504216727, now seen corresponding path program 9 times [2021-06-05 22:41:50,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:50,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692897861] [2021-06-05 22:41:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:50,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:50,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692897861] [2021-06-05 22:41:50,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692897861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:50,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521025754] [2021-06-05 22:41:50,879 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 [2021-06-05 22:41:50,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:41:50,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:50,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:41:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:51,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:51,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:51,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:51,197 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 49 treesize of output 25 [2021-06-05 22:41:51,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:51,226 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-06-05 22:41:51,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:51,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:10 [2021-06-05 22:41:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:51,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521025754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:51,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:51,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:41:51,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88193160] [2021-06-05 22:41:51,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:51,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:51,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:51,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:51,241 INFO L87 Difference]: Start difference. First operand 247 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:51,665 INFO L93 Difference]: Finished difference Result 598 states and 1212 transitions. [2021-06-05 22:41:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:41:51,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-05 22:41:51,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:51,668 INFO L225 Difference]: With dead ends: 598 [2021-06-05 22:41:51,668 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 22:41:51,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 22:41:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 235. [2021-06-05 22:41:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-06-05 22:41:51,675 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-06-05 22:41:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:51,675 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-06-05 22:41:51,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-06-05 22:41:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:51,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:51,676 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:51,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:41:51,900 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash -49601197, now seen corresponding path program 10 times [2021-06-05 22:41:51,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:51,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052384490] [2021-06-05 22:41:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:52,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:52,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052384490] [2021-06-05 22:41:52,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052384490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:52,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020452232] [2021-06-05 22:41:52,074 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 [2021-06-05 22:41:52,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:52,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:52,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:52,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:52,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:52,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:52,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:52,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:52,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:52,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:52,335 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 53 treesize of output 25 [2021-06-05 22:41:52,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:52,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:52,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:52,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:52,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020452232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:52,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:52,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:41:52,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812422015] [2021-06-05 22:41:52,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:52,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:52,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:52,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:52,357 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:52,597 INFO L93 Difference]: Finished difference Result 470 states and 964 transitions. [2021-06-05 22:41:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:41:52,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-05 22:41:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:52,599 INFO L225 Difference]: With dead ends: 470 [2021-06-05 22:41:52,599 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 22:41:52,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 22:41:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-06-05 22:41:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-06-05 22:41:52,606 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-06-05 22:41:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:52,606 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-06-05 22:41:52,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-06-05 22:41:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:52,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:52,607 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:52,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 22:41:52,808 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:52,808 INFO L82 PathProgramCache]: Analyzing trace with hash 802414539, now seen corresponding path program 11 times [2021-06-05 22:41:52,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:52,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481666452] [2021-06-05 22:41:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:52,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:52,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481666452] [2021-06-05 22:41:52,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481666452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:52,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940878417] [2021-06-05 22:41:52,960 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 [2021-06-05 22:41:52,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:41:52,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:52,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:53,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:53,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:53,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:53,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:53,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:53,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:53,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:53,225 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 53 treesize of output 25 [2021-06-05 22:41:53,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:53,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:53,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:53,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:53,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940878417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:53,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:53,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:41:53,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319678596] [2021-06-05 22:41:53,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:53,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:53,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:53,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:53,247 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:53,466 INFO L93 Difference]: Finished difference Result 414 states and 855 transitions. [2021-06-05 22:41:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:41:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-05 22:41:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:53,467 INFO L225 Difference]: With dead ends: 414 [2021-06-05 22:41:53,468 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 22:41:53,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 22:41:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 245. [2021-06-05 22:41:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.05327868852459) internal successors, (501), 244 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 501 transitions. [2021-06-05 22:41:53,474 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 501 transitions. Word has length 26 [2021-06-05 22:41:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:53,474 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 501 transitions. [2021-06-05 22:41:53,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 501 transitions. [2021-06-05 22:41:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:53,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:53,475 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:53,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:41:53,698 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:53,699 INFO L82 PathProgramCache]: Analyzing trace with hash 509590407, now seen corresponding path program 12 times [2021-06-05 22:41:53,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:53,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871488819] [2021-06-05 22:41:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:41:53,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:53,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871488819] [2021-06-05 22:41:53,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871488819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:53,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903650915] [2021-06-05 22:41:53,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:53,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:41:53,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:53,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:53,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:54,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:54,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:54,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:54,098 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 53 treesize of output 25 [2021-06-05 22:41:54,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:54,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:54,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:54,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:54,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903650915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:54,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:54,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:41:54,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777386672] [2021-06-05 22:41:54,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:41:54,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:41:54,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:41:54,125 INFO L87 Difference]: Start difference. First operand 245 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:54,429 INFO L93 Difference]: Finished difference Result 610 states and 1221 transitions. [2021-06-05 22:41:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:41:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:41:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:54,432 INFO L225 Difference]: With dead ends: 610 [2021-06-05 22:41:54,432 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 22:41:54,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:41:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 22:41:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 293. [2021-06-05 22:41:54,438 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) [2021-06-05 22:41:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-06-05 22:41:54,439 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 26 [2021-06-05 22:41:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:54,439 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-06-05 22:41:54,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-06-05 22:41:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:54,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:54,440 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:54,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:54,641 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:54,641 INFO L82 PathProgramCache]: Analyzing trace with hash -964381697, now seen corresponding path program 13 times [2021-06-05 22:41:54,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:54,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628902505] [2021-06-05 22:41:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:54,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:54,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628902505] [2021-06-05 22:41:54,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628902505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:54,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140364928] [2021-06-05 22:41:54,819 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 [2021-06-05 22:41:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:54,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:54,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:55,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:55,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:55,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:55,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:55,056 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 53 treesize of output 25 [2021-06-05 22:41:55,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:55,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:55,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:55,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:55,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140364928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:55,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:55,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:41:55,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224058598] [2021-06-05 22:41:55,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:41:55,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:55,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:41:55,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:41:55,081 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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) [2021-06-05 22:41:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:55,322 INFO L93 Difference]: Finished difference Result 634 states and 1305 transitions. [2021-06-05 22:41:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:41:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 26 [2021-06-05 22:41:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:55,324 INFO L225 Difference]: With dead ends: 634 [2021-06-05 22:41:55,324 INFO L226 Difference]: Without dead ends: 581 [2021-06-05 22:41:55,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-05 22:41:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 290. [2021-06-05 22:41:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-06-05 22:41:55,333 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-06-05 22:41:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:55,333 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-06-05 22:41:55,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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) [2021-06-05 22:41:55,333 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-06-05 22:41:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:55,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:55,334 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:55,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:55,534 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:55,535 INFO L82 PathProgramCache]: Analyzing trace with hash 490233833, now seen corresponding path program 14 times [2021-06-05 22:41:55,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:55,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346298633] [2021-06-05 22:41:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:55,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:55,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346298633] [2021-06-05 22:41:55,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346298633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:55,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491184426] [2021-06-05 22:41:55,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:55,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:55,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:55,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:55,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:55,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:55,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:55,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:55,960 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 53 treesize of output 25 [2021-06-05 22:41:55,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:55,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:55,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:55,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:55,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491184426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:55,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:55,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:41:55,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102906543] [2021-06-05 22:41:55,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:41:55,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:55,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:41:55,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:41:55,982 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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) [2021-06-05 22:41:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:56,286 INFO L93 Difference]: Finished difference Result 541 states and 1096 transitions. [2021-06-05 22:41:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:41:56,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 26 [2021-06-05 22:41:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:56,289 INFO L225 Difference]: With dead ends: 541 [2021-06-05 22:41:56,289 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 22:41:56,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 22:41:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-06-05 22:41:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-06-05 22:41:56,298 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-06-05 22:41:56,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:56,298 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-06-05 22:41:56,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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) [2021-06-05 22:41:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-06-05 22:41:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:56,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:56,299 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:56,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:56,513 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:56,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1342249569, now seen corresponding path program 15 times [2021-06-05 22:41:56,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:56,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53268492] [2021-06-05 22:41:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:56,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:56,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53268492] [2021-06-05 22:41:56,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53268492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:56,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692345845] [2021-06-05 22:41:56,760 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 [2021-06-05 22:41:56,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:41:56,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:56,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:56,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:57,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:57,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:57,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:57,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:57,005 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 53 treesize of output 25 [2021-06-05 22:41:57,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:57,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:57,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:57,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 22:41:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:57,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692345845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:57,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:57,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:41:57,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575735682] [2021-06-05 22:41:57,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:41:57,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:41:57,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:41:57,027 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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) [2021-06-05 22:41:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:57,341 INFO L93 Difference]: Finished difference Result 524 states and 1067 transitions. [2021-06-05 22:41:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:41:57,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 26 [2021-06-05 22:41:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:57,347 INFO L225 Difference]: With dead ends: 524 [2021-06-05 22:41:57,347 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 22:41:57,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 22:41:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 272. [2021-06-05 22:41:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.992619926199262) internal successors, (540), 271 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 540 transitions. [2021-06-05 22:41:57,354 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 540 transitions. Word has length 26 [2021-06-05 22:41:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:57,355 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 540 transitions. [2021-06-05 22:41:57,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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) [2021-06-05 22:41:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 540 transitions. [2021-06-05 22:41:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:41:57,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:57,356 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:57,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 22:41:57,573 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash -931564597, now seen corresponding path program 16 times [2021-06-05 22:41:57,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:57,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113468640] [2021-06-05 22:41:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:57,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:57,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113468640] [2021-06-05 22:41:57,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113468640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:57,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210260699] [2021-06-05 22:41:57,738 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 [2021-06-05 22:41:57,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:57,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:57,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:57,925 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 22:41:57,925 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 53 treesize of output 25 [2021-06-05 22:41:57,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:57,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:57,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:57,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 22:41:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:57,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210260699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:57,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:57,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:41:57,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766444772] [2021-06-05 22:41:57,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:41:57,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:57,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:41:57,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:41:57,943 INFO L87 Difference]: Start difference. First operand 272 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-06-05 22:41:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:58,181 INFO L93 Difference]: Finished difference Result 369 states and 744 transitions. [2021-06-05 22:41:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:41:58,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 26 [2021-06-05 22:41:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:58,182 INFO L225 Difference]: With dead ends: 369 [2021-06-05 22:41:58,183 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 22:41:58,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:58,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 22:41:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 279. [2021-06-05 22:41:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.9964028776978417) internal successors, (555), 278 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 555 transitions. [2021-06-05 22:41:58,189 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 555 transitions. Word has length 26 [2021-06-05 22:41:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:58,189 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 555 transitions. [2021-06-05 22:41:58,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-06-05 22:41:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 555 transitions. [2021-06-05 22:41:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:41:58,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:58,190 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:58,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 22:41:58,405 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1396364564, now seen corresponding path program 17 times [2021-06-05 22:41:58,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:58,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944211663] [2021-06-05 22:41:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:58,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:58,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944211663] [2021-06-05 22:41:58,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944211663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:58,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114918031] [2021-06-05 22:41:58,436 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 [2021-06-05 22:41:58,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:41:58,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:58,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:41:58,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:58,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114918031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:58,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:58,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 22:41:58,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161923327] [2021-06-05 22:41:58,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:41:58,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:58,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:41:58,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:41:58,514 INFO L87 Difference]: Start difference. First operand 279 states and 555 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 22:41:58,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:58,537 INFO L93 Difference]: Finished difference Result 479 states and 948 transitions. [2021-06-05 22:41:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:41:58,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 28 [2021-06-05 22:41:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:58,540 INFO L225 Difference]: With dead ends: 479 [2021-06-05 22:41:58,540 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 22:41:58,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:41:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 22:41:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 320. [2021-06-05 22:41:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0250783699059562) internal successors, (646), 319 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 646 transitions. [2021-06-05 22:41:58,548 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 646 transitions. Word has length 28 [2021-06-05 22:41:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:58,548 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 646 transitions. [2021-06-05 22:41:58,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 22:41:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 646 transitions. [2021-06-05 22:41:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:41:58,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:58,549 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:58,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 22:41:58,765 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash -160566182, now seen corresponding path program 18 times [2021-06-05 22:41:58,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:58,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875875774] [2021-06-05 22:41:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:41:59,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:59,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875875774] [2021-06-05 22:41:59,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875875774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:59,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53637103] [2021-06-05 22:41:59,021 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 [2021-06-05 22:41:59,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:41:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:59,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:41:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:59,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:59,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:59,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:59,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:59,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:59,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:59,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:59,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:59,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:59,444 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 72 treesize of output 32 [2021-06-05 22:41:59,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:59,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:59,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:59,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:41:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:59,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53637103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:59,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:59,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 22:41:59,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876466142] [2021-06-05 22:41:59,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:59,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:59,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:59,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:59,466 INFO L87 Difference]: Start difference. First operand 320 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:59,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:59,640 INFO L93 Difference]: Finished difference Result 708 states and 1436 transitions. [2021-06-05 22:41:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:41:59,640 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2021-06-05 22:41:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:59,642 INFO L225 Difference]: With dead ends: 708 [2021-06-05 22:41:59,642 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 22:41:59,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 489.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:41:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 22:41:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 392. [2021-06-05 22:41:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-06-05 22:41:59,650 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 31 [2021-06-05 22:41:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:59,651 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-06-05 22:41:59,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-06-05 22:41:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:41:59,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:59,652 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:59,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 22:41:59,873 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1308942062, now seen corresponding path program 19 times [2021-06-05 22:41:59,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:59,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118059270] [2021-06-05 22:41:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:00,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:00,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118059270] [2021-06-05 22:42:00,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118059270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:00,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637502943] [2021-06-05 22:42:00,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:00,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:00,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:00,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:00,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:00,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:00,515 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 72 treesize of output 32 [2021-06-05 22:42:00,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:00,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:00,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:00,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:00,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637502943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:00,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:00,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:00,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653981657] [2021-06-05 22:42:00,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:00,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:00,538 INFO L87 Difference]: Start difference. First operand 392 states and 786 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) [2021-06-05 22:42:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:00,788 INFO L93 Difference]: Finished difference Result 810 states and 1669 transitions. [2021-06-05 22:42:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:42:00,788 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 31 [2021-06-05 22:42:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:00,790 INFO L225 Difference]: With dead ends: 810 [2021-06-05 22:42:00,791 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 22:42:00,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 22:42:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 413. [2021-06-05 22:42:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0072815533980584) internal successors, (827), 412 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 827 transitions. [2021-06-05 22:42:00,800 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 827 transitions. Word has length 31 [2021-06-05 22:42:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:00,800 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 827 transitions. [2021-06-05 22:42:00,800 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) [2021-06-05 22:42:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 827 transitions. [2021-06-05 22:42:00,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:00,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:00,801 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:01,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 22:42:01,024 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:01,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1649221820, now seen corresponding path program 20 times [2021-06-05 22:42:01,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:01,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078937391] [2021-06-05 22:42:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:01,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:01,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078937391] [2021-06-05 22:42:01,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078937391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:01,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767926234] [2021-06-05 22:42:01,266 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 [2021-06-05 22:42:01,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:01,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:01,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:01,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:01,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:01,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:01,711 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 72 treesize of output 32 [2021-06-05 22:42:01,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:01,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:01,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:01,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:01,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767926234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:01,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:01,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:01,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381978892] [2021-06-05 22:42:01,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:01,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:01,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:01,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:01,733 INFO L87 Difference]: Start difference. First operand 413 states and 827 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) [2021-06-05 22:42:02,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:02,069 INFO L93 Difference]: Finished difference Result 880 states and 1806 transitions. [2021-06-05 22:42:02,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:02,070 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 31 [2021-06-05 22:42:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:02,073 INFO L225 Difference]: With dead ends: 880 [2021-06-05 22:42:02,073 INFO L226 Difference]: Without dead ends: 824 [2021-06-05 22:42:02,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 493.3ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-05 22:42:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 425. [2021-06-05 22:42:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2021-06-05 22:42:02,082 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 31 [2021-06-05 22:42:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:02,082 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2021-06-05 22:42:02,082 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) [2021-06-05 22:42:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2021-06-05 22:42:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:02,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:02,083 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:02,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:02,284 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:02,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1866596212, now seen corresponding path program 21 times [2021-06-05 22:42:02,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:02,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617295127] [2021-06-05 22:42:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:02,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:02,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617295127] [2021-06-05 22:42:02,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617295127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:02,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77458377] [2021-06-05 22:42:02,540 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 [2021-06-05 22:42:02,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:42:02,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:02,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:02,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:02,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:02,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:02,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:02,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:02,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:02,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:02,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:02,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:02,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:02,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:02,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:02,987 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 72 treesize of output 32 [2021-06-05 22:42:02,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:02,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:02,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:02,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77458377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:03,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:03,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:03,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533285320] [2021-06-05 22:42:03,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:03,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:03,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:03,010 INFO L87 Difference]: Start difference. First operand 425 states and 852 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) [2021-06-05 22:42:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:03,255 INFO L93 Difference]: Finished difference Result 809 states and 1648 transitions. [2021-06-05 22:42:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:03,256 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 31 [2021-06-05 22:42:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:03,259 INFO L225 Difference]: With dead ends: 809 [2021-06-05 22:42:03,259 INFO L226 Difference]: Without dead ends: 769 [2021-06-05 22:42:03,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 523.0ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-05 22:42:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 428. [2021-06-05 22:42:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.011709601873536) internal successors, (859), 427 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 859 transitions. [2021-06-05 22:42:03,268 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 859 transitions. Word has length 31 [2021-06-05 22:42:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:03,268 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 859 transitions. [2021-06-05 22:42:03,268 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) [2021-06-05 22:42:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 859 transitions. [2021-06-05 22:42:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:03,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:03,269 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:03,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 22:42:03,489 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash 865807024, now seen corresponding path program 22 times [2021-06-05 22:42:03,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:03,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32675989] [2021-06-05 22:42:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 22:42:03,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:03,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32675989] [2021-06-05 22:42:03,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32675989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:03,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258803242] [2021-06-05 22:42:03,685 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 [2021-06-05 22:42:03,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:03,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:03,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:03,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:04,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:04,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:04,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:04,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:04,020 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 72 treesize of output 32 [2021-06-05 22:42:04,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:04,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:04,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:04,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:04,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258803242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:04,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:04,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2021-06-05 22:42:04,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125793743] [2021-06-05 22:42:04,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:04,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:04,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:04,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:04,042 INFO L87 Difference]: Start difference. First operand 428 states and 859 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) [2021-06-05 22:42:04,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:04,280 INFO L93 Difference]: Finished difference Result 853 states and 1716 transitions. [2021-06-05 22:42:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:42:04,280 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 31 [2021-06-05 22:42:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:04,282 INFO L225 Difference]: With dead ends: 853 [2021-06-05 22:42:04,282 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 22:42:04,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 22:42:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 464. [2021-06-05 22:42:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.9978401727861772) internal successors, (925), 463 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 925 transitions. [2021-06-05 22:42:04,290 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 925 transitions. Word has length 31 [2021-06-05 22:42:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:04,290 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 925 transitions. [2021-06-05 22:42:04,290 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) [2021-06-05 22:42:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 925 transitions. [2021-06-05 22:42:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:04,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:04,291 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:04,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:04,509 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:04,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:04,509 INFO L82 PathProgramCache]: Analyzing trace with hash -282568856, now seen corresponding path program 23 times [2021-06-05 22:42:04,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:04,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25115373] [2021-06-05 22:42:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:42:04,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:04,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25115373] [2021-06-05 22:42:04,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25115373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:04,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163465622] [2021-06-05 22:42:04,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:04,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:42:04,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:04,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:05,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:05,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:05,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:05,095 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 72 treesize of output 32 [2021-06-05 22:42:05,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:05,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:05,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:05,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:05,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163465622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:05,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:05,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 22:42:05,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592046428] [2021-06-05 22:42:05,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:05,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:05,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:05,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:05,117 INFO L87 Difference]: Start difference. First operand 464 states and 925 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:05,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:05,404 INFO L93 Difference]: Finished difference Result 925 states and 1897 transitions. [2021-06-05 22:42:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:42:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2021-06-05 22:42:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:05,407 INFO L225 Difference]: With dead ends: 925 [2021-06-05 22:42:05,407 INFO L226 Difference]: Without dead ends: 872 [2021-06-05 22:42:05,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-05 22:42:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 461. [2021-06-05 22:42:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.9978260869565216) internal successors, (919), 460 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 919 transitions. [2021-06-05 22:42:05,416 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 919 transitions. Word has length 31 [2021-06-05 22:42:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:05,416 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 919 transitions. [2021-06-05 22:42:05,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 919 transitions. [2021-06-05 22:42:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:05,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:05,417 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:05,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:42:05,637 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1619372270, now seen corresponding path program 24 times [2021-06-05 22:42:05,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:05,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408766256] [2021-06-05 22:42:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:05,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:05,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408766256] [2021-06-05 22:42:05,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408766256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:05,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939141926] [2021-06-05 22:42:05,842 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 [2021-06-05 22:42:05,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:42:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:05,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:05,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:06,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:06,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:06,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:06,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:06,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:06,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:06,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:06,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:06,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:06,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:06,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:06,198 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 72 treesize of output 32 [2021-06-05 22:42:06,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:06,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:06,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:06,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:06,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939141926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:06,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:06,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 22:42:06,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331295863] [2021-06-05 22:42:06,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:06,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:06,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:06,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:06,233 INFO L87 Difference]: Start difference. First operand 461 states and 919 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-06-05 22:42:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:06,564 INFO L93 Difference]: Finished difference Result 962 states and 1970 transitions. [2021-06-05 22:42:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:42:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 31 [2021-06-05 22:42:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:06,567 INFO L225 Difference]: With dead ends: 962 [2021-06-05 22:42:06,567 INFO L226 Difference]: Without dead ends: 906 [2021-06-05 22:42:06,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 432.9ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-05 22:42:06,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 458. [2021-06-05 22:42:06,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.9978118161925602) internal successors, (913), 457 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 913 transitions. [2021-06-05 22:42:06,575 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 913 transitions. Word has length 31 [2021-06-05 22:42:06,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:06,576 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 913 transitions. [2021-06-05 22:42:06,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-06-05 22:42:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 913 transitions. [2021-06-05 22:42:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:06,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:06,577 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:06,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:06,793 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1401997878, now seen corresponding path program 25 times [2021-06-05 22:42:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:06,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608821704] [2021-06-05 22:42:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:07,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608821704] [2021-06-05 22:42:07,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608821704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609885380] [2021-06-05 22:42:07,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:07,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:07,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:07,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:07,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:07,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:07,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:07,487 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 72 treesize of output 32 [2021-06-05 22:42:07,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:07,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:07,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:07,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:07,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609885380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:07,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:07,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:07,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22148431] [2021-06-05 22:42:07,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:07,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:07,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:07,508 INFO L87 Difference]: Start difference. First operand 458 states and 913 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) [2021-06-05 22:42:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:07,745 INFO L93 Difference]: Finished difference Result 936 states and 1914 transitions. [2021-06-05 22:42:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:42:07,745 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 31 [2021-06-05 22:42:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:07,747 INFO L225 Difference]: With dead ends: 936 [2021-06-05 22:42:07,747 INFO L226 Difference]: Without dead ends: 877 [2021-06-05 22:42:07,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 540.2ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-06-05 22:42:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 434. [2021-06-05 22:42:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0115473441108547) internal successors, (871), 433 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 871 transitions. [2021-06-05 22:42:07,754 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 871 transitions. Word has length 31 [2021-06-05 22:42:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:07,755 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 871 transitions. [2021-06-05 22:42:07,755 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) [2021-06-05 22:42:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 871 transitions. [2021-06-05 22:42:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:07,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:07,756 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:07,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 22:42:07,969 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1874857228, now seen corresponding path program 26 times [2021-06-05 22:42:07,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:07,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864773004] [2021-06-05 22:42:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:08,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:08,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864773004] [2021-06-05 22:42:08,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864773004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:08,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456327927] [2021-06-05 22:42:08,200 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:08,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:08,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:08,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:08,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:08,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:08,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:08,555 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 72 treesize of output 32 [2021-06-05 22:42:08,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:08,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:08,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:08,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:08,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456327927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:08,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:08,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:08,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619686631] [2021-06-05 22:42:08,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:08,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:08,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:08,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:08,573 INFO L87 Difference]: Start difference. First operand 434 states and 871 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) [2021-06-05 22:42:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:08,820 INFO L93 Difference]: Finished difference Result 947 states and 1941 transitions. [2021-06-05 22:42:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:42:08,821 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 31 [2021-06-05 22:42:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:08,823 INFO L225 Difference]: With dead ends: 947 [2021-06-05 22:42:08,823 INFO L226 Difference]: Without dead ends: 905 [2021-06-05 22:42:08,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-05 22:42:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 431. [2021-06-05 22:42:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.0186046511627906) internal successors, (868), 430 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 868 transitions. [2021-06-05 22:42:08,831 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 868 transitions. Word has length 31 [2021-06-05 22:42:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:08,831 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 868 transitions. [2021-06-05 22:42:08,831 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) [2021-06-05 22:42:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 868 transitions. [2021-06-05 22:42:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:08,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:08,832 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:09,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:09,045 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:09,045 INFO L82 PathProgramCache]: Analyzing trace with hash 615761780, now seen corresponding path program 27 times [2021-06-05 22:42:09,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:09,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964800362] [2021-06-05 22:42:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:09,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:09,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964800362] [2021-06-05 22:42:09,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964800362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:09,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960701495] [2021-06-05 22:42:09,274 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 [2021-06-05 22:42:09,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:42:09,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:09,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:09,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:09,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:09,767 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 70 treesize of output 32 [2021-06-05 22:42:09,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:09,791 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 22:42:09,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:09,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-06-05 22:42:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:09,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960701495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:09,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:09,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:09,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180894354] [2021-06-05 22:42:09,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:09,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:09,805 INFO L87 Difference]: Start difference. First operand 431 states and 868 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) [2021-06-05 22:42:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:10,134 INFO L93 Difference]: Finished difference Result 780 states and 1574 transitions. [2021-06-05 22:42:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:10,134 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 31 [2021-06-05 22:42:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:10,136 INFO L225 Difference]: With dead ends: 780 [2021-06-05 22:42:10,136 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 22:42:10,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:42:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 22:42:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 470. [2021-06-05 22:42:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-06-05 22:42:10,144 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-06-05 22:42:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:10,144 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-06-05 22:42:10,144 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) [2021-06-05 22:42:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-06-05 22:42:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:10,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:10,145 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:10,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 22:42:10,361 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 833136172, now seen corresponding path program 28 times [2021-06-05 22:42:10,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:10,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032955403] [2021-06-05 22:42:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:10,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032955403] [2021-06-05 22:42:10,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032955403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915643722] [2021-06-05 22:42:10,587 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 [2021-06-05 22:42:10,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:10,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:10,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:10,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:10,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:10,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:10,955 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 72 treesize of output 32 [2021-06-05 22:42:10,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:10,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:10,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:10,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:10,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915643722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:10,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:10,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:10,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834628008] [2021-06-05 22:42:10,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:10,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:10,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:10,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:10,974 INFO L87 Difference]: Start difference. First operand 470 states and 940 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) [2021-06-05 22:42:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:11,275 INFO L93 Difference]: Finished difference Result 833 states and 1680 transitions. [2021-06-05 22:42:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:11,275 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 31 [2021-06-05 22:42:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:11,278 INFO L225 Difference]: With dead ends: 833 [2021-06-05 22:42:11,278 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 22:42:11,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 22:42:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 470. [2021-06-05 22:42:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-06-05 22:42:11,286 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-06-05 22:42:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:11,286 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-06-05 22:42:11,286 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) [2021-06-05 22:42:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-06-05 22:42:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:11,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:11,287 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:11,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:11,505 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash -167653016, now seen corresponding path program 29 times [2021-06-05 22:42:11,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:11,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948054040] [2021-06-05 22:42:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:42:11,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:11,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948054040] [2021-06-05 22:42:11,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948054040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:11,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085417896] [2021-06-05 22:42:11,697 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 [2021-06-05 22:42:11,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:42:11,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:11,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:12,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:12,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:12,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:12,099 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 70 treesize of output 32 [2021-06-05 22:42:12,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:12,119 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 22:42:12,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:12,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-06-05 22:42:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:12,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085417896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:12,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:12,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 22:42:12,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821050696] [2021-06-05 22:42:12,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:12,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:12,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:12,131 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:12,544 INFO L93 Difference]: Finished difference Result 1001 states and 2003 transitions. [2021-06-05 22:42:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:42:12,544 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2021-06-05 22:42:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:12,548 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:42:12,548 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 22:42:12,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 604.0ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:42:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 22:42:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 512. [2021-06-05 22:42:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.9921722113502935) internal successors, (1018), 511 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1018 transitions. [2021-06-05 22:42:12,556 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1018 transitions. Word has length 31 [2021-06-05 22:42:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:12,556 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1018 transitions. [2021-06-05 22:42:12,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1018 transitions. [2021-06-05 22:42:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:12,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:12,562 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:12,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 22:42:12,779 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:12,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:12,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1642134986, now seen corresponding path program 30 times [2021-06-05 22:42:12,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:12,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485877053] [2021-06-05 22:42:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:13,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:13,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485877053] [2021-06-05 22:42:13,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485877053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:13,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734122940] [2021-06-05 22:42:13,019 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 [2021-06-05 22:42:13,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:42:13,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:13,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:13,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:13,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:13,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:13,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:13,356 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 72 treesize of output 32 [2021-06-05 22:42:13,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:13,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:13,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:13,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:13,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734122940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:13,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:13,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 22:42:13,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419686996] [2021-06-05 22:42:13,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:13,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:13,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:13,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:13,387 INFO L87 Difference]: Start difference. First operand 512 states and 1018 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-06-05 22:42:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:13,634 INFO L93 Difference]: Finished difference Result 1117 states and 2272 transitions. [2021-06-05 22:42:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:42:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 31 [2021-06-05 22:42:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:13,637 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 22:42:13,637 INFO L226 Difference]: Without dead ends: 1061 [2021-06-05 22:42:13,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 413.3ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-05 22:42:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 539. [2021-06-05 22:42:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.986988847583643) internal successors, (1069), 538 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1069 transitions. [2021-06-05 22:42:13,646 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1069 transitions. Word has length 31 [2021-06-05 22:42:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:13,646 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1069 transitions. [2021-06-05 22:42:13,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-06-05 22:42:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1069 transitions. [2021-06-05 22:42:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:13,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:13,647 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:13,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 22:42:13,871 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:13,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:13,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1859509378, now seen corresponding path program 31 times [2021-06-05 22:42:13,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:13,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086620301] [2021-06-05 22:42:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:14,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:14,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086620301] [2021-06-05 22:42:14,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086620301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:14,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157350847] [2021-06-05 22:42:14,075 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 [2021-06-05 22:42:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:14,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:14,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:14,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:14,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:14,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:14,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:14,472 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 72 treesize of output 32 [2021-06-05 22:42:14,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:14,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:14,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:14,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:14,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157350847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:14,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:14,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:14,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200528857] [2021-06-05 22:42:14,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:14,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:14,492 INFO L87 Difference]: Start difference. First operand 539 states and 1069 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) [2021-06-05 22:42:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:14,771 INFO L93 Difference]: Finished difference Result 1088 states and 2213 transitions. [2021-06-05 22:42:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:42:14,771 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 31 [2021-06-05 22:42:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:14,773 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 22:42:14,773 INFO L226 Difference]: Without dead ends: 1029 [2021-06-05 22:42:14,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-05 22:42:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 536. [2021-06-05 22:42:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.9869158878504674) internal successors, (1063), 535 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1063 transitions. [2021-06-05 22:42:14,780 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1063 transitions. Word has length 31 [2021-06-05 22:42:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:14,780 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1063 transitions. [2021-06-05 22:42:14,780 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) [2021-06-05 22:42:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1063 transitions. [2021-06-05 22:42:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:14,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:14,781 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:14,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:42:14,982 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1386650028, now seen corresponding path program 32 times [2021-06-05 22:42:14,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:14,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377532593] [2021-06-05 22:42:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:15,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:15,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377532593] [2021-06-05 22:42:15,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377532593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:15,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867482722] [2021-06-05 22:42:15,180 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 [2021-06-05 22:42:15,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:15,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:15,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:15,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:15,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:15,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:15,541 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 72 treesize of output 32 [2021-06-05 22:42:15,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:15,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:15,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:15,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:15,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867482722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:15,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:15,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:15,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604596459] [2021-06-05 22:42:15,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:15,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:15,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:15,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:15,559 INFO L87 Difference]: Start difference. First operand 536 states and 1063 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) [2021-06-05 22:42:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:15,856 INFO L93 Difference]: Finished difference Result 1059 states and 2151 transitions. [2021-06-05 22:42:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:42:15,856 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 31 [2021-06-05 22:42:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:15,858 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 22:42:15,858 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 22:42:15,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 22:42:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 533. [2021-06-05 22:42:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.986842105263158) internal successors, (1057), 532 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1057 transitions. [2021-06-05 22:42:15,867 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1057 transitions. Word has length 31 [2021-06-05 22:42:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:15,867 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1057 transitions. [2021-06-05 22:42:15,867 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) [2021-06-05 22:42:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1057 transitions. [2021-06-05 22:42:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:15,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:15,868 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:16,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 22:42:16,081 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1919082992, now seen corresponding path program 33 times [2021-06-05 22:42:16,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:16,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499095816] [2021-06-05 22:42:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:42:16,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499095816] [2021-06-05 22:42:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499095816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618449187] [2021-06-05 22:42:16,271 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 [2021-06-05 22:42:16,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:42:16,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:16,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:16,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:16,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:16,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:16,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:16,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:16,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:16,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:16,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:16,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:16,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:16,638 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 72 treesize of output 32 [2021-06-05 22:42:16,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:16,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:16,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:16,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:16,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618449187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:16,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:16,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 22:42:16,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509719730] [2021-06-05 22:42:16,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:16,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:16,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:16,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:16,656 INFO L87 Difference]: Start difference. First operand 533 states and 1057 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:16,900 INFO L93 Difference]: Finished difference Result 1026 states and 2079 transitions. [2021-06-05 22:42:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:42:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2021-06-05 22:42:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:16,903 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 22:42:16,903 INFO L226 Difference]: Without dead ends: 938 [2021-06-05 22:42:16,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 416.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-05 22:42:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 575. [2021-06-05 22:42:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.9825783972125435) internal successors, (1138), 574 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1138 transitions. [2021-06-05 22:42:16,912 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1138 transitions. Word has length 31 [2021-06-05 22:42:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:16,912 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1138 transitions. [2021-06-05 22:42:16,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1138 transitions. [2021-06-05 22:42:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:16,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:16,913 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:17,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 22:42:17,117 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash -566096302, now seen corresponding path program 34 times [2021-06-05 22:42:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116639946] [2021-06-05 22:42:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:17,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:17,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116639946] [2021-06-05 22:42:17,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116639946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:17,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252401784] [2021-06-05 22:42:17,319 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 [2021-06-05 22:42:17,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:17,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:17,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:17,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:17,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:17,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:17,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:17,726 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 72 treesize of output 32 [2021-06-05 22:42:17,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:17,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:17,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:17,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:17,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252401784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:17,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:17,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 22:42:17,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859834417] [2021-06-05 22:42:17,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:17,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:17,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:17,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:17,745 INFO L87 Difference]: Start difference. First operand 575 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-06-05 22:42:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:17,981 INFO L93 Difference]: Finished difference Result 1110 states and 2251 transitions. [2021-06-05 22:42:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:17,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 31 [2021-06-05 22:42:17,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:17,984 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 22:42:17,984 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 22:42:17,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 22:42:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 563. [2021-06-05 22:42:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.9822064056939501) internal successors, (1114), 562 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1114 transitions. [2021-06-05 22:42:17,994 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1114 transitions. Word has length 31 [2021-06-05 22:42:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:17,994 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1114 transitions. [2021-06-05 22:42:17,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-06-05 22:42:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1114 transitions. [2021-06-05 22:42:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:17,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:17,995 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:18,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:42:18,201 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash -348721910, now seen corresponding path program 35 times [2021-06-05 22:42:18,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:18,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035265174] [2021-06-05 22:42:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:18,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:18,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035265174] [2021-06-05 22:42:18,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035265174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:18,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832481691] [2021-06-05 22:42:18,422 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 [2021-06-05 22:42:18,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:42:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:18,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:42:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:18,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:18,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:18,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:18,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-06-05 22:42:18,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:18,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:18,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:18,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:9 [2021-06-05 22:42:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:18,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832481691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:18,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:18,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 22:42:18,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281328899] [2021-06-05 22:42:18,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:42:18,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:18,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:42:18,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:42:18,943 INFO L87 Difference]: Start difference. First operand 563 states and 1114 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:19,978 INFO L93 Difference]: Finished difference Result 1236 states and 2487 transitions. [2021-06-05 22:42:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:42:19,979 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 [2021-06-05 22:42:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:19,981 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 22:42:19,981 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 22:42:19,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1109.4ms TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:42:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 22:42:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 578. [2021-06-05 22:42:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.977469670710572) internal successors, (1141), 577 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1141 transitions. [2021-06-05 22:42:19,989 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1141 transitions. Word has length 31 [2021-06-05 22:42:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:19,989 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1141 transitions. [2021-06-05 22:42:19,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1141 transitions. [2021-06-05 22:42:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:19,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:19,990 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:20,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 22:42:20,190 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash -821581260, now seen corresponding path program 36 times [2021-06-05 22:42:20,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:20,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266597357] [2021-06-05 22:42:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:20,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:20,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266597357] [2021-06-05 22:42:20,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266597357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:20,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696453986] [2021-06-05 22:42:20,408 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 [2021-06-05 22:42:20,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:42:20,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:20,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:42:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:20,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:20,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:20,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:20,801 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 72 treesize of output 32 [2021-06-05 22:42:20,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:20,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:20,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:20,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:20,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696453986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:20,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:20,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:20,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32573057] [2021-06-05 22:42:20,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:20,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:20,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:20,821 INFO L87 Difference]: Start difference. First operand 578 states and 1141 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) [2021-06-05 22:42:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:21,012 INFO L93 Difference]: Finished difference Result 1207 states and 2430 transitions. [2021-06-05 22:42:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:42:21,013 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 31 [2021-06-05 22:42:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:21,015 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 22:42:21,015 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 22:42:21,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:21,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 22:42:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 614. [2021-06-05 22:42:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.9804241435562806) internal successors, (1214), 613 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1214 transitions. [2021-06-05 22:42:21,024 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1214 transitions. Word has length 31 [2021-06-05 22:42:21,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:21,025 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1214 transitions. [2021-06-05 22:42:21,025 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) [2021-06-05 22:42:21,025 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1214 transitions. [2021-06-05 22:42:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:21,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:21,026 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:21,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:21,237 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:21,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1916779244, now seen corresponding path program 37 times [2021-06-05 22:42:21,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:21,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165907778] [2021-06-05 22:42:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:21,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:21,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165907778] [2021-06-05 22:42:21,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165907778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:21,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806802608] [2021-06-05 22:42:21,442 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) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:21,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:21,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:21,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:21,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:21,832 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 72 treesize of output 32 [2021-06-05 22:42:21,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:21,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:21,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:21,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:21,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806802608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:21,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:21,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 22:42:21,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495544353] [2021-06-05 22:42:21,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:42:21,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:42:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:21,850 INFO L87 Difference]: Start difference. First operand 614 states and 1214 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) [2021-06-05 22:42:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:22,185 INFO L93 Difference]: Finished difference Result 1033 states and 2073 transitions. [2021-06-05 22:42:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:22,186 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 31 [2021-06-05 22:42:22,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:22,187 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 22:42:22,187 INFO L226 Difference]: Without dead ends: 1010 [2021-06-05 22:42:22,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-05 22:42:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 624. [2021-06-05 22:42:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.9823434991974318) internal successors, (1235), 623 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:22,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1235 transitions. [2021-06-05 22:42:22,194 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1235 transitions. Word has length 31 [2021-06-05 22:42:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:22,194 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1235 transitions. [2021-06-05 22:42:22,194 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) [2021-06-05 22:42:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1235 transitions. [2021-06-05 22:42:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:22,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:22,196 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:22,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:22,396 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1512927684, now seen corresponding path program 38 times [2021-06-05 22:42:22,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:22,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447471144] [2021-06-05 22:42:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:22,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:22,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447471144] [2021-06-05 22:42:22,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447471144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:22,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528135465] [2021-06-05 22:42:22,647 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 [2021-06-05 22:42:22,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:22,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:22,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:22,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:23,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:23,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:23,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:23,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:23,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:23,016 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 72 treesize of output 32 [2021-06-05 22:42:23,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:23,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:23,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:23,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:23,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528135465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:23,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:23,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 22:42:23,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650157220] [2021-06-05 22:42:23,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:23,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:23,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:23,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:23,041 INFO L87 Difference]: Start difference. First operand 624 states and 1235 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:23,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:23,445 INFO L93 Difference]: Finished difference Result 1316 states and 2627 transitions. [2021-06-05 22:42:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:42:23,445 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) Word has length 31 [2021-06-05 22:42:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:23,447 INFO L225 Difference]: With dead ends: 1316 [2021-06-05 22:42:23,447 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 22:42:23,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 563.0ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 22:42:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 717. [2021-06-05 22:42:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.9594972067039107) internal successors, (1403), 716 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1403 transitions. [2021-06-05 22:42:23,456 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1403 transitions. Word has length 31 [2021-06-05 22:42:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:23,456 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1403 transitions. [2021-06-05 22:42:23,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1403 transitions. [2021-06-05 22:42:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:23,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:23,457 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:23,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:23,680 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash 514234710, now seen corresponding path program 39 times [2021-06-05 22:42:23,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:23,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324529133] [2021-06-05 22:42:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:23,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324529133] [2021-06-05 22:42:23,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324529133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547890626] [2021-06-05 22:42:23,898 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 [2021-06-05 22:42:23,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:42:23,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:23,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:23,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:24,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:24,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:24,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:24,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:24,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:24,219 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 72 treesize of output 32 [2021-06-05 22:42:24,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:24,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:24,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:24,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:24,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547890626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:24,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:24,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 22:42:24,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470236182] [2021-06-05 22:42:24,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:24,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:24,238 INFO L87 Difference]: Start difference. First operand 717 states and 1403 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:24,475 INFO L93 Difference]: Finished difference Result 1252 states and 2517 transitions. [2021-06-05 22:42:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) Word has length 31 [2021-06-05 22:42:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:24,477 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 22:42:24,477 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 22:42:24,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 22:42:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 762. [2021-06-05 22:42:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.9540078843626807) internal successors, (1487), 761 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1487 transitions. [2021-06-05 22:42:24,485 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1487 transitions. Word has length 31 [2021-06-05 22:42:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:24,485 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1487 transitions. [2021-06-05 22:42:24,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1487 transitions. [2021-06-05 22:42:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:24,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:24,487 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:24,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 22:42:24,688 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash -486554478, now seen corresponding path program 40 times [2021-06-05 22:42:24,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:24,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751950846] [2021-06-05 22:42:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:24,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:24,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751950846] [2021-06-05 22:42:24,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751950846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:24,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521072757] [2021-06-05 22:42:24,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:24,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:24,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:24,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:24,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:25,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:25,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:25,269 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 72 treesize of output 32 [2021-06-05 22:42:25,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:25,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:25,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:25,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:25,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521072757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:25,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:25,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 22:42:25,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079766705] [2021-06-05 22:42:25,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:25,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:25,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:25,291 INFO L87 Difference]: Start difference. First operand 762 states and 1487 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-06-05 22:42:25,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:25,642 INFO L93 Difference]: Finished difference Result 1353 states and 2677 transitions. [2021-06-05 22:42:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:42:25,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 31 [2021-06-05 22:42:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:25,644 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 22:42:25,644 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 22:42:25,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 22:42:25,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 678. [2021-06-05 22:42:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.9748892171344166) internal successors, (1337), 677 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1337 transitions. [2021-06-05 22:42:25,655 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1337 transitions. Word has length 31 [2021-06-05 22:42:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:25,655 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 1337 transitions. [2021-06-05 22:42:25,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-06-05 22:42:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1337 transitions. [2021-06-05 22:42:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:25,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:25,656 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:25,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:25,873 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:25,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1540607916, now seen corresponding path program 41 times [2021-06-05 22:42:25,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:25,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613233190] [2021-06-05 22:42:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:26,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:26,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613233190] [2021-06-05 22:42:26,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613233190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:26,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173763453] [2021-06-05 22:42:26,076 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 [2021-06-05 22:42:26,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:42:26,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:26,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:26,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:26,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:26,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:26,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:26,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:26,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:26,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:26,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:26,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:26,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:26,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:26,461 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 72 treesize of output 32 [2021-06-05 22:42:26,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:26,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:26,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:26,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:26,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173763453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:26,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:26,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 22:42:26,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989618231] [2021-06-05 22:42:26,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:26,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:26,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:26,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:26,481 INFO L87 Difference]: Start difference. First operand 678 states and 1337 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:26,705 INFO L93 Difference]: Finished difference Result 1283 states and 2599 transitions. [2021-06-05 22:42:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:42:26,706 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) Word has length 31 [2021-06-05 22:42:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:26,707 INFO L225 Difference]: With dead ends: 1283 [2021-06-05 22:42:26,707 INFO L226 Difference]: Without dead ends: 1224 [2021-06-05 22:42:26,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 447.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-05 22:42:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 681. [2021-06-05 22:42:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.975) internal successors, (1343), 680 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1343 transitions. [2021-06-05 22:42:26,715 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1343 transitions. Word has length 31 [2021-06-05 22:42:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:26,715 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1343 transitions. [2021-06-05 22:42:26,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1343 transitions. [2021-06-05 22:42:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:26,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:26,716 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:26,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:26,922 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:26,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1067748566, now seen corresponding path program 42 times [2021-06-05 22:42:26,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:26,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744527385] [2021-06-05 22:42:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:27,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744527385] [2021-06-05 22:42:27,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744527385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395246918] [2021-06-05 22:42:27,117 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 [2021-06-05 22:42:27,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:42:27,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:27,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:27,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:27,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:27,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:27,495 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 72 treesize of output 32 [2021-06-05 22:42:27,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:27,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:27,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:27,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395246918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:27,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:27,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 22:42:27,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909794207] [2021-06-05 22:42:27,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:27,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:27,514 INFO L87 Difference]: Start difference. First operand 681 states and 1343 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:27,759 INFO L93 Difference]: Finished difference Result 1174 states and 2374 transitions. [2021-06-05 22:42:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:42:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) Word has length 31 [2021-06-05 22:42:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:27,761 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 22:42:27,761 INFO L226 Difference]: Without dead ends: 1132 [2021-06-05 22:42:27,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:42:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-06-05 22:42:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 684. [2021-06-05 22:42:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.9751098096632504) internal successors, (1349), 683 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1349 transitions. [2021-06-05 22:42:27,769 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1349 transitions. Word has length 31 [2021-06-05 22:42:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:27,769 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1349 transitions. [2021-06-05 22:42:27,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1349 transitions. [2021-06-05 22:42:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:27,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:27,770 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:27,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 22:42:27,971 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:27,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:27,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1600181530, now seen corresponding path program 43 times [2021-06-05 22:42:27,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:27,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982464777] [2021-06-05 22:42:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:28,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:28,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982464777] [2021-06-05 22:42:28,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982464777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:28,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397354219] [2021-06-05 22:42:28,175 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 [2021-06-05 22:42:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:28,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:28,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:28,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:28,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:28,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:28,506 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 72 treesize of output 32 [2021-06-05 22:42:28,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:28,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:28,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:28,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:28,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397354219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:28,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:28,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 22:42:28,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236437818] [2021-06-05 22:42:28,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:28,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:28,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:28,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:28,528 INFO L87 Difference]: Start difference. First operand 684 states and 1349 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-06-05 22:42:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:28,778 INFO L93 Difference]: Finished difference Result 1381 states and 2772 transitions. [2021-06-05 22:42:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:42:28,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 31 [2021-06-05 22:42:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:28,780 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 22:42:28,780 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 22:42:28,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 22:42:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 759. [2021-06-05 22:42:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.9736147757255937) internal successors, (1496), 758 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1496 transitions. [2021-06-05 22:42:28,789 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1496 transitions. Word has length 31 [2021-06-05 22:42:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:28,789 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 1496 transitions. [2021-06-05 22:42:28,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-06-05 22:42:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1496 transitions. [2021-06-05 22:42:28,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:28,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:28,790 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:29,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 22:42:29,013 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -667623372, now seen corresponding path program 44 times [2021-06-05 22:42:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:29,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523660178] [2021-06-05 22:42:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:29,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523660178] [2021-06-05 22:42:29,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523660178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327442389] [2021-06-05 22:42:29,212 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 [2021-06-05 22:42:29,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:29,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:29,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:29,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:29,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:29,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:29,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:29,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:29,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:29,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:29,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:29,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:29,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:29,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:29,568 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 72 treesize of output 32 [2021-06-05 22:42:29,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:29,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:29,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:29,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:29,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327442389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:29,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:29,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 22:42:29,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605527942] [2021-06-05 22:42:29,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:29,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:29,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:29,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:29,586 INFO L87 Difference]: Start difference. First operand 759 states and 1496 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:29,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:29,879 INFO L93 Difference]: Finished difference Result 1359 states and 2747 transitions. [2021-06-05 22:42:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:29,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) Word has length 31 [2021-06-05 22:42:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:29,884 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 22:42:29,885 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 22:42:29,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 22:42:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 774. [2021-06-05 22:42:29,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-05 22:42:29,898 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-05 22:42:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:29,898 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-05 22:42:29,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:29,898 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-05 22:42:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:29,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:29,900 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:30,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 22:42:30,122 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:30,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1140482722, now seen corresponding path program 45 times [2021-06-05 22:42:30,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:30,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97561258] [2021-06-05 22:42:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:30,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:30,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97561258] [2021-06-05 22:42:30,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97561258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:30,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719668234] [2021-06-05 22:42:30,348 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 [2021-06-05 22:42:30,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:42:30,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:30,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:30,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:30,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:30,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:30,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:30,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:30,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:30,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:30,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:30,750 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 72 treesize of output 32 [2021-06-05 22:42:30,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:30,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:30,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:30,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:30,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719668234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:30,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:30,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 22:42:30,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222193972] [2021-06-05 22:42:30,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:30,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:30,772 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:30,978 INFO L93 Difference]: Finished difference Result 1116 states and 2233 transitions. [2021-06-05 22:42:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) Word has length 31 [2021-06-05 22:42:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:30,981 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 22:42:30,981 INFO L226 Difference]: Without dead ends: 1094 [2021-06-05 22:42:30,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 464.8ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-05 22:42:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 774. [2021-06-05 22:42:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-05 22:42:30,992 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-05 22:42:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:30,992 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-05 22:42:30,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-05 22:42:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:30,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:30,994 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:31,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:31,209 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1597877782, now seen corresponding path program 46 times [2021-06-05 22:42:31,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:31,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775299908] [2021-06-05 22:42:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:31,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:31,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775299908] [2021-06-05 22:42:31,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775299908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:31,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707613785] [2021-06-05 22:42:31,445 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 [2021-06-05 22:42:31,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:31,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:31,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:31,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:31,789 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 72 treesize of output 32 [2021-06-05 22:42:31,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:31,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:31,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:31,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:31,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707613785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:31,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:31,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 22:42:31,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684564052] [2021-06-05 22:42:31,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:31,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:31,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:31,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:31,807 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:32,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:32,162 INFO L93 Difference]: Finished difference Result 1127 states and 2256 transitions. [2021-06-05 22:42:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:32,163 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) Word has length 31 [2021-06-05 22:42:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:32,164 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 22:42:32,164 INFO L226 Difference]: Without dead ends: 1104 [2021-06-05 22:42:32,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-05 22:42:32,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 774. [2021-06-05 22:42:32,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-05 22:42:32,173 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-05 22:42:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:32,173 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-05 22:42:32,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) 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) [2021-06-05 22:42:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-05 22:42:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:32,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:32,175 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:32,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:32,380 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:32,385 INFO L82 PathProgramCache]: Analyzing trace with hash 102354416, now seen corresponding path program 47 times [2021-06-05 22:42:32,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:32,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483403949] [2021-06-05 22:42:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:32,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:32,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483403949] [2021-06-05 22:42:32,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483403949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:32,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360538203] [2021-06-05 22:42:32,632 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 [2021-06-05 22:42:32,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:42:32,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:32,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:32,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:32,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:32,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:32,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:32,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 22:42:32,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:33,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:33,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:33,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:33,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360538203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:33,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:33,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-05 22:42:33,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792604897] [2021-06-05 22:42:33,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:33,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:33,012 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:33,186 INFO L93 Difference]: Finished difference Result 1217 states and 2444 transitions. [2021-06-05 22:42:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:33,186 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 31 [2021-06-05 22:42:33,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:33,188 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 22:42:33,189 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 22:42:33,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:33,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 22:42:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 801. [2021-06-05 22:42:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.98125) internal successors, (1585), 800 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) [2021-06-05 22:42:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1585 transitions. [2021-06-05 22:42:33,200 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1585 transitions. Word has length 31 [2021-06-05 22:42:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:33,200 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 1585 transitions. [2021-06-05 22:42:33,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:33,201 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1585 transitions. [2021-06-05 22:42:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:33,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:33,202 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:33,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 22:42:33,417 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1046021464, now seen corresponding path program 48 times [2021-06-05 22:42:33,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:33,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383390808] [2021-06-05 22:42:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:33,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:33,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383390808] [2021-06-05 22:42:33,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383390808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:33,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033004129] [2021-06-05 22:42:33,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:33,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:42:33,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:33,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:33,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:33,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:33,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:33,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:33,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:33,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:33,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:33,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:33,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:33,882 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 72 treesize of output 32 [2021-06-05 22:42:33,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:33,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:33,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:33,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:33,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033004129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:33,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:33,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-05 22:42:33,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650993111] [2021-06-05 22:42:33,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:33,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:33,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:33,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:33,903 INFO L87 Difference]: Start difference. First operand 801 states and 1585 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:34,179 INFO L93 Difference]: Finished difference Result 1401 states and 2833 transitions. [2021-06-05 22:42:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 31 [2021-06-05 22:42:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:34,181 INFO L225 Difference]: With dead ends: 1401 [2021-06-05 22:42:34,181 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 22:42:34,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 22:42:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 795. [2021-06-05 22:42:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.978589420654912) internal successors, (1571), 794 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1571 transitions. [2021-06-05 22:42:34,193 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1571 transitions. Word has length 31 [2021-06-05 22:42:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:34,193 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1571 transitions. [2021-06-05 22:42:34,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1571 transitions. [2021-06-05 22:42:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:34,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:34,194 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:34,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:34,417 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2129516810, now seen corresponding path program 49 times [2021-06-05 22:42:34,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:34,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954897606] [2021-06-05 22:42:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:34,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:34,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954897606] [2021-06-05 22:42:34,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954897606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:34,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126090213] [2021-06-05 22:42:34,631 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 [2021-06-05 22:42:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:34,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:34,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:34,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:34,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:34,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:34,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:34,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:34,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:34,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:34,932 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 72 treesize of output 32 [2021-06-05 22:42:34,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:34,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:34,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:34,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:34,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126090213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:34,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:34,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 22:42:34,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58328479] [2021-06-05 22:42:34,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:34,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:34,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:34,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:34,954 INFO L87 Difference]: Start difference. First operand 795 states and 1571 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:35,275 INFO L93 Difference]: Finished difference Result 1359 states and 2744 transitions. [2021-06-05 22:42:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:35,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 31 [2021-06-05 22:42:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:35,277 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 22:42:35,277 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 22:42:35,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 22:42:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 783. [2021-06-05 22:42:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-06-05 22:42:35,285 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-06-05 22:42:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:35,285 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-06-05 22:42:35,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-06-05 22:42:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:35,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:35,286 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:35,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 22:42:35,487 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:35,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:35,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1656657460, now seen corresponding path program 50 times [2021-06-05 22:42:35,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:35,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231199850] [2021-06-05 22:42:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:35,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:35,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231199850] [2021-06-05 22:42:35,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231199850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:35,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996437299] [2021-06-05 22:42:35,730 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 [2021-06-05 22:42:35,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:35,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:35,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:36,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:36,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:36,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:36,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:36,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:36,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:36,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:36,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:36,122 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 72 treesize of output 32 [2021-06-05 22:42:36,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:36,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:36,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:36,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:36,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996437299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:36,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:36,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 22:42:36,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154391829] [2021-06-05 22:42:36,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:36,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:36,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:36,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:36,143 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:36,466 INFO L93 Difference]: Finished difference Result 1153 states and 2311 transitions. [2021-06-05 22:42:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:36,466 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 31 [2021-06-05 22:42:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:36,468 INFO L225 Difference]: With dead ends: 1153 [2021-06-05 22:42:36,468 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 22:42:36,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 22:42:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 783. [2021-06-05 22:42:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-06-05 22:42:36,478 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-06-05 22:42:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:36,478 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-06-05 22:42:36,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-06-05 22:42:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:36,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:36,480 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:36,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 22:42:36,702 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:36,703 INFO L82 PathProgramCache]: Analyzing trace with hash 100050668, now seen corresponding path program 51 times [2021-06-05 22:42:36,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:36,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252127232] [2021-06-05 22:42:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:36,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:36,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252127232] [2021-06-05 22:42:36,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252127232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:36,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775730855] [2021-06-05 22:42:36,933 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 [2021-06-05 22:42:36,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:42:36,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:36,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:36,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:37,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:37,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:37,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:37,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:37,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:37,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:37,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:37,318 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 72 treesize of output 32 [2021-06-05 22:42:37,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:37,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:37,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:37,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:37,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775730855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:37,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:37,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 22:42:37,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947600624] [2021-06-05 22:42:37,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:37,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:37,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:37,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:37,342 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:37,598 INFO L93 Difference]: Finished difference Result 1136 states and 2278 transitions. [2021-06-05 22:42:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:42:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 31 [2021-06-05 22:42:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:37,600 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 22:42:37,600 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 22:42:37,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 22:42:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 777. [2021-06-05 22:42:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.9755154639175259) internal successors, (1533), 776 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1533 transitions. [2021-06-05 22:42:37,607 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1533 transitions. Word has length 31 [2021-06-05 22:42:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:37,607 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 1533 transitions. [2021-06-05 22:42:37,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1533 transitions. [2021-06-05 22:42:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:42:37,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:37,609 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:37,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 22:42:37,831 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:37,832 INFO L82 PathProgramCache]: Analyzing trace with hash 948748694, now seen corresponding path program 52 times [2021-06-05 22:42:37,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:37,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192162321] [2021-06-05 22:42:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:38,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:38,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192162321] [2021-06-05 22:42:38,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192162321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:38,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865547155] [2021-06-05 22:42:38,074 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 [2021-06-05 22:42:38,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:38,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:38,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:38,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:38,373 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 22:42:38,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 22:42:38,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:38,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:38,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:38,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:12 [2021-06-05 22:42:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:38,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865547155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:38,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:38,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 22:42:38,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645746286] [2021-06-05 22:42:38,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:38,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:38,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:38,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:38,394 INFO L87 Difference]: Start difference. First operand 777 states and 1533 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:38,674 INFO L93 Difference]: Finished difference Result 1012 states and 2014 transitions. [2021-06-05 22:42:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:42:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 22:42:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:38,675 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 22:42:38,675 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 22:42:38,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 22:42:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2021-06-05 22:42:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.9770114942528736) internal successors, (1548), 783 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1548 transitions. [2021-06-05 22:42:38,685 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1548 transitions. Word has length 31 [2021-06-05 22:42:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:38,686 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1548 transitions. [2021-06-05 22:42:38,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1548 transitions. [2021-06-05 22:42:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:42:38,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:38,687 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:38,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 22:42:38,901 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1698443767, now seen corresponding path program 53 times [2021-06-05 22:42:38,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:38,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156367525] [2021-06-05 22:42:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:38,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:38,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156367525] [2021-06-05 22:42:38,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156367525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:38,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768287557] [2021-06-05 22:42:38,931 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 [2021-06-05 22:42:38,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:42:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:42:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:39,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768287557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:39,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:39,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 22:42:39,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439292340] [2021-06-05 22:42:39,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:42:39,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:39,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:42:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:42:39,018 INFO L87 Difference]: Start difference. First operand 784 states and 1548 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:39,039 INFO L93 Difference]: Finished difference Result 1073 states and 2126 transitions. [2021-06-05 22:42:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:42:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 22:42:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:39,041 INFO L225 Difference]: With dead ends: 1073 [2021-06-05 22:42:39,041 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 22:42:39,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:42:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 22:42:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 845. [2021-06-05 22:42:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.9940758293838863) internal successors, (1683), 844 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1683 transitions. [2021-06-05 22:42:39,048 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1683 transitions. Word has length 33 [2021-06-05 22:42:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:39,048 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 1683 transitions. [2021-06-05 22:42:39,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1683 transitions. [2021-06-05 22:42:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 22:42:39,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:39,049 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:39,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:39,250 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash 602846472, now seen corresponding path program 54 times [2021-06-05 22:42:39,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:39,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508477869] [2021-06-05 22:42:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:42:39,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:39,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508477869] [2021-06-05 22:42:39,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508477869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:39,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653194321] [2021-06-05 22:42:39,450 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 [2021-06-05 22:42:39,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:42:39,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:39,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:39,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:39,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:39,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:39,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:39,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:39,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:39,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:39,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:39,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:39,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:39,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:39,811 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 72 treesize of output 32 [2021-06-05 22:42:39,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:39,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:39,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:39,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:42:39,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653194321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:39,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:39,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 22:42:39,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881294983] [2021-06-05 22:42:39,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:39,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:39,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:39,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:39,828 INFO L87 Difference]: Start difference. First operand 845 states and 1683 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) [2021-06-05 22:42:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:40,183 INFO L93 Difference]: Finished difference Result 1429 states and 2876 transitions. [2021-06-05 22:42:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:42:40,184 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 34 [2021-06-05 22:42:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:40,185 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 22:42:40,185 INFO L226 Difference]: Without dead ends: 1414 [2021-06-05 22:42:40,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 492.0ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:40,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-05 22:42:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 869. [2021-06-05 22:42:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.9907834101382489) internal successors, (1728), 868 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1728 transitions. [2021-06-05 22:42:40,194 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1728 transitions. Word has length 34 [2021-06-05 22:42:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:40,194 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 1728 transitions. [2021-06-05 22:42:40,194 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) [2021-06-05 22:42:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1728 transitions. [2021-06-05 22:42:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 22:42:40,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:40,195 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:40,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 22:42:40,396 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:40,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:40,396 INFO L82 PathProgramCache]: Analyzing trace with hash 867153280, now seen corresponding path program 55 times [2021-06-05 22:42:40,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:40,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771990256] [2021-06-05 22:42:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:42:40,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:40,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771990256] [2021-06-05 22:42:40,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771990256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:40,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359436103] [2021-06-05 22:42:40,623 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 [2021-06-05 22:42:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:40,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:40,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:40,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:40,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:40,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:40,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:40,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:40,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:40,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:40,962 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 72 treesize of output 32 [2021-06-05 22:42:40,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:40,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:40,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:40,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:42:40,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359436103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:40,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:40,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 22:42:40,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124030562] [2021-06-05 22:42:40,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:40,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:40,992 INFO L87 Difference]: Start difference. First operand 869 states and 1728 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) [2021-06-05 22:42:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:41,380 INFO L93 Difference]: Finished difference Result 1640 states and 3316 transitions. [2021-06-05 22:42:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:42:41,380 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 34 [2021-06-05 22:42:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:41,381 INFO L225 Difference]: With dead ends: 1640 [2021-06-05 22:42:41,381 INFO L226 Difference]: Without dead ends: 1595 [2021-06-05 22:42:41,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:42:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-06-05 22:42:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 926. [2021-06-05 22:42:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9848648648648648) internal successors, (1836), 925 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1836 transitions. [2021-06-05 22:42:41,390 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1836 transitions. Word has length 34 [2021-06-05 22:42:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:41,390 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1836 transitions. [2021-06-05 22:42:41,390 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) [2021-06-05 22:42:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1836 transitions. [2021-06-05 22:42:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 22:42:41,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:41,391 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:41,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:41,592 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1679153002, now seen corresponding path program 56 times [2021-06-05 22:42:41,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:41,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756433731] [2021-06-05 22:42:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:42:41,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:41,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756433731] [2021-06-05 22:42:41,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756433731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:41,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968822483] [2021-06-05 22:42:41,787 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 [2021-06-05 22:42:41,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:41,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:41,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:42:41,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:42,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:42,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:42,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:42,138 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 72 treesize of output 32 [2021-06-05 22:42:42,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:42,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:42,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:42,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 22:42:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:42:42,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968822483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:42,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:42,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 22:42:42,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161342989] [2021-06-05 22:42:42,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:42,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:42,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:42,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:42,156 INFO L87 Difference]: Start difference. First operand 926 states and 1836 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-06-05 22:42:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:42,583 INFO L93 Difference]: Finished difference Result 1557 states and 3145 transitions. [2021-06-05 22:42:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:42:42,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 34 [2021-06-05 22:42:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:42,585 INFO L225 Difference]: With dead ends: 1557 [2021-06-05 22:42:42,585 INFO L226 Difference]: Without dead ends: 1512 [2021-06-05 22:42:42,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 519.4ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-06-05 22:42:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 896. [2021-06-05 22:42:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.987709497206704) internal successors, (1779), 895 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1779 transitions. [2021-06-05 22:42:42,594 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1779 transitions. Word has length 34 [2021-06-05 22:42:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:42,594 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 1779 transitions. [2021-06-05 22:42:42,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-06-05 22:42:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1779 transitions. [2021-06-05 22:42:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:42,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:42,595 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:42,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 22:42:42,795 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:42,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:42,796 INFO L82 PathProgramCache]: Analyzing trace with hash 431279499, now seen corresponding path program 57 times [2021-06-05 22:42:42,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:42,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608660519] [2021-06-05 22:42:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:42:43,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:43,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608660519] [2021-06-05 22:42:43,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608660519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:43,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862634785] [2021-06-05 22:42:43,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:43,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:42:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:43,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:42:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:43,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:43,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:43,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:43,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:43,535 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 89 treesize of output 37 [2021-06-05 22:42:43,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:43,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:43,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:43,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:42:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:43,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862634785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:43,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:43,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 22:42:43,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940860359] [2021-06-05 22:42:43,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:42:43,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:43,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:42:43,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:42:43,586 INFO L87 Difference]: Start difference. First operand 896 states and 1779 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:44,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:44,015 INFO L93 Difference]: Finished difference Result 1846 states and 3731 transitions. [2021-06-05 22:42:44,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:42:44,016 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:42:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:44,018 INFO L225 Difference]: With dead ends: 1846 [2021-06-05 22:42:44,018 INFO L226 Difference]: Without dead ends: 1801 [2021-06-05 22:42:44,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:42:44,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-06-05 22:42:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 926. [2021-06-05 22:42:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9891891891891893) internal successors, (1840), 925 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1840 transitions. [2021-06-05 22:42:44,031 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1840 transitions. Word has length 36 [2021-06-05 22:42:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:44,032 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1840 transitions. [2021-06-05 22:42:44,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1840 transitions. [2021-06-05 22:42:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:44,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:44,033 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:44,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:44,257 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:44,258 INFO L82 PathProgramCache]: Analyzing trace with hash 971114529, now seen corresponding path program 58 times [2021-06-05 22:42:44,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:44,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422453163] [2021-06-05 22:42:44,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:42:44,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:44,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422453163] [2021-06-05 22:42:44,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422453163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:44,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055722740] [2021-06-05 22:42:44,508 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 [2021-06-05 22:42:44,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:44,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:42:44,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:45,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:45,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:45,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:45,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:45,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:45,025 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 89 treesize of output 37 [2021-06-05 22:42:45,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:45,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:45,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:45,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:42:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:45,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055722740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:45,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:45,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 22:42:45,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761864798] [2021-06-05 22:42:45,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:42:45,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:45,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:42:45,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:42:45,081 INFO L87 Difference]: Start difference. First operand 926 states and 1840 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:45,533 INFO L93 Difference]: Finished difference Result 2095 states and 4241 transitions. [2021-06-05 22:42:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:42:45,534 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:42:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:45,535 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 22:42:45,535 INFO L226 Difference]: Without dead ends: 2049 [2021-06-05 22:42:45,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 723.5ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:42:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-05 22:42:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1030. [2021-06-05 22:42:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.0136054421768708) internal successors, (2072), 1029 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2072 transitions. [2021-06-05 22:42:45,546 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2072 transitions. Word has length 36 [2021-06-05 22:42:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:45,546 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2072 transitions. [2021-06-05 22:42:45,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2072 transitions. [2021-06-05 22:42:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:45,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:45,548 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:45,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 22:42:45,748 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:45,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1302699637, now seen corresponding path program 59 times [2021-06-05 22:42:45,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:45,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935267937] [2021-06-05 22:42:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:42:46,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:46,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935267937] [2021-06-05 22:42:46,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935267937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:46,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709566536] [2021-06-05 22:42:46,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:46,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:42:46,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:46,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 22:42:46,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:46,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:46,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:46,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:46,506 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 89 treesize of output 37 [2021-06-05 22:42:46,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:46,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:46,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:46,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:42:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:46,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709566536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:46,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:46,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 22:42:46,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632383303] [2021-06-05 22:42:46,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:42:46,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:42:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:42:46,547 INFO L87 Difference]: Start difference. First operand 1030 states and 2072 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:46,968 INFO L93 Difference]: Finished difference Result 1598 states and 3240 transitions. [2021-06-05 22:42:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:42:46,968 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:42:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:46,969 INFO L225 Difference]: With dead ends: 1598 [2021-06-05 22:42:46,969 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 22:42:46,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:42:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 22:42:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1036. [2021-06-05 22:42:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.0144927536231885) internal successors, (2085), 1035 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2085 transitions. [2021-06-05 22:42:46,979 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2085 transitions. Word has length 36 [2021-06-05 22:42:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:46,979 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2085 transitions. [2021-06-05 22:42:46,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2085 transitions. [2021-06-05 22:42:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:46,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:46,980 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:47,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:47,181 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1027051523, now seen corresponding path program 60 times [2021-06-05 22:42:47,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:47,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120345988] [2021-06-05 22:42:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:47,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:47,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120345988] [2021-06-05 22:42:47,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120345988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:47,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469732228] [2021-06-05 22:42:47,457 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 [2021-06-05 22:42:47,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:42:47,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:47,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:42:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:47,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:47,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:47,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:47,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:47,990 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 89 treesize of output 37 [2021-06-05 22:42:47,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:47,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:47,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:47,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:42:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:48,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469732228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:48,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:48,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 22:42:48,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198775372] [2021-06-05 22:42:48,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 22:42:48,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:48,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 22:42:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:42:48,031 INFO L87 Difference]: Start difference. First operand 1036 states and 2085 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:48,434 INFO L93 Difference]: Finished difference Result 2409 states and 4930 transitions. [2021-06-05 22:42:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:42:48,434 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:42:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:48,437 INFO L225 Difference]: With dead ends: 2409 [2021-06-05 22:42:48,437 INFO L226 Difference]: Without dead ends: 2332 [2021-06-05 22:42:48,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 724.8ms TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:42:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-05 22:42:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1084. [2021-06-05 22:42:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.0083102493074794) internal successors, (2175), 1083 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2175 transitions. [2021-06-05 22:42:48,449 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2175 transitions. Word has length 36 [2021-06-05 22:42:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:48,449 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 2175 transitions. [2021-06-05 22:42:48,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2175 transitions. [2021-06-05 22:42:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:48,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:48,450 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:48,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 22:42:48,651 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1566886553, now seen corresponding path program 61 times [2021-06-05 22:42:48,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:48,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780967024] [2021-06-05 22:42:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:48,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:48,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780967024] [2021-06-05 22:42:48,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780967024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:48,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276789132] [2021-06-05 22:42:48,949 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 [2021-06-05 22:42:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:48,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:42:48,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:49,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:49,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:49,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:49,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:49,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:49,502 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 89 treesize of output 37 [2021-06-05 22:42:49,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:49,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:49,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:49,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:42:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:49,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276789132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:49,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:49,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 22:42:49,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93101130] [2021-06-05 22:42:49,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 22:42:49,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 22:42:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:42:49,543 INFO L87 Difference]: Start difference. First operand 1084 states and 2175 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:50,246 INFO L93 Difference]: Finished difference Result 2544 states and 5180 transitions. [2021-06-05 22:42:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:42:50,247 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:42:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:50,249 INFO L225 Difference]: With dead ends: 2544 [2021-06-05 22:42:50,249 INFO L226 Difference]: Without dead ends: 2466 [2021-06-05 22:42:50,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 808.9ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:42:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-05 22:42:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 1207. [2021-06-05 22:42:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-06-05 22:42:50,265 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-06-05 22:42:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:50,265 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-06-05 22:42:50,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-06-05 22:42:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:50,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:50,267 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:50,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:50,481 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:50,481 INFO L82 PathProgramCache]: Analyzing trace with hash -706927613, now seen corresponding path program 62 times [2021-06-05 22:42:50,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:50,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598859453] [2021-06-05 22:42:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:50,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598859453] [2021-06-05 22:42:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598859453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172079770] [2021-06-05 22:42:50,759 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 [2021-06-05 22:42:50,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:50,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:50,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:42:50,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:51,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:51,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:51,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:51,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:51,318 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 89 treesize of output 37 [2021-06-05 22:42:51,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:51,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:51,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:51,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:42:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:51,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172079770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:51,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:51,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 22:42:51,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81127817] [2021-06-05 22:42:51,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 22:42:51,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:51,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 22:42:51,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:42:51,359 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:52,006 INFO L93 Difference]: Finished difference Result 2101 states and 4239 transitions. [2021-06-05 22:42:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:42:52,006 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:42:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:52,008 INFO L225 Difference]: With dead ends: 2101 [2021-06-05 22:42:52,008 INFO L226 Difference]: Without dead ends: 2073 [2021-06-05 22:42:52,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 743.2ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:42:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-06-05 22:42:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1207. [2021-06-05 22:42:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-06-05 22:42:52,020 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-06-05 22:42:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:52,020 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-06-05 22:42:52,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-06-05 22:42:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:52,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:52,021 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:52,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 22:42:52,222 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:52,222 INFO L82 PathProgramCache]: Analyzing trace with hash 623181831, now seen corresponding path program 63 times [2021-06-05 22:42:52,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:52,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534419726] [2021-06-05 22:42:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:42:52,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:52,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534419726] [2021-06-05 22:42:52,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534419726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:52,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205662717] [2021-06-05 22:42:52,468 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 [2021-06-05 22:42:52,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:42:52,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:52,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:42:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:52,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:52,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:52,946 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 89 treesize of output 37 [2021-06-05 22:42:52,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:52,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:52,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:52,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:42:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:52,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205662717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:52,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:52,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 28 [2021-06-05 22:42:52,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353496459] [2021-06-05 22:42:52,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:42:52,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:52,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:42:52,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:42:52,986 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:53,373 INFO L93 Difference]: Finished difference Result 2018 states and 4044 transitions. [2021-06-05 22:42:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:42:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:42:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:53,375 INFO L225 Difference]: With dead ends: 2018 [2021-06-05 22:42:53,375 INFO L226 Difference]: Without dead ends: 1879 [2021-06-05 22:42:53,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 712.1ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:42:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-06-05 22:42:53,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1350. [2021-06-05 22:42:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.9940696812453669) internal successors, (2690), 1349 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2690 transitions. [2021-06-05 22:42:53,393 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2690 transitions. Word has length 36 [2021-06-05 22:42:53,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:53,393 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 2690 transitions. [2021-06-05 22:42:53,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2690 transitions. [2021-06-05 22:42:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:53,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:53,395 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:53,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 22:42:53,618 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:53,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:53,618 INFO L82 PathProgramCache]: Analyzing trace with hash 603825257, now seen corresponding path program 64 times [2021-06-05 22:42:53,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:53,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344247710] [2021-06-05 22:42:53,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:53,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:53,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344247710] [2021-06-05 22:42:53,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344247710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:53,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423417317] [2021-06-05 22:42:53,878 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 [2021-06-05 22:42:53,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:53,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:53,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:42:53,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:54,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:54,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:54,405 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 89 treesize of output 37 [2021-06-05 22:42:54,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:54,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:54,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:54,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:42:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:54,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423417317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:54,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:54,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 22:42:54,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844795165] [2021-06-05 22:42:54,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:42:54,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:54,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:42:54,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:42:54,447 INFO L87 Difference]: Start difference. First operand 1350 states and 2690 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:54,892 INFO L93 Difference]: Finished difference Result 2339 states and 4747 transitions. [2021-06-05 22:42:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:42:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:42:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:54,895 INFO L225 Difference]: With dead ends: 2339 [2021-06-05 22:42:54,895 INFO L226 Difference]: Without dead ends: 2297 [2021-06-05 22:42:54,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 731.0ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:42:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-05 22:42:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1365. [2021-06-05 22:42:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-06-05 22:42:54,913 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-06-05 22:42:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:54,913 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-06-05 22:42:54,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-06-05 22:42:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:54,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:54,914 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:55,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 22:42:55,115 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1455840993, now seen corresponding path program 65 times [2021-06-05 22:42:55,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:55,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011655796] [2021-06-05 22:42:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:55,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:55,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011655796] [2021-06-05 22:42:55,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011655796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:55,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056095526] [2021-06-05 22:42:55,422 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 [2021-06-05 22:42:55,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:42:55,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:55,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:42:55,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:56,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:56,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:56,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:56,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:56,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:56,033 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 66 treesize of output 30 [2021-06-05 22:42:56,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:56,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:56,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:56,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 22:42:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:56,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056095526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:56,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:56,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 22:42:56,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924780616] [2021-06-05 22:42:56,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:42:56,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:56,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:42:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:42:56,084 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-06-05 22:42:56,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:56,734 INFO L93 Difference]: Finished difference Result 2510 states and 5065 transitions. [2021-06-05 22:42:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:42:56,734 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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 36 [2021-06-05 22:42:56,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:56,736 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 22:42:56,736 INFO L226 Difference]: Without dead ends: 2465 [2021-06-05 22:42:56,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 911.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:42:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-05 22:42:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1365. [2021-06-05 22:42:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-06-05 22:42:56,750 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-06-05 22:42:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:56,750 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-06-05 22:42:56,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-06-05 22:42:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-06-05 22:42:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:42:56,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:56,752 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:56,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:56,952 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:56,952 INFO L82 PathProgramCache]: Analyzing trace with hash -817973173, now seen corresponding path program 66 times [2021-06-05 22:42:56,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:56,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184786365] [2021-06-05 22:42:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:57,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:57,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184786365] [2021-06-05 22:42:57,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184786365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:57,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054039526] [2021-06-05 22:42:57,215 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 [2021-06-05 22:42:57,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:42:57,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:57,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:42:57,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:58,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:58,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:58,225 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 83 treesize of output 37 [2021-06-05 22:42:58,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:58,248 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-05 22:42:58,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:58,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-06-05 22:42:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:58,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054039526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:58,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:58,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 22:42:58,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590270279] [2021-06-05 22:42:58,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 22:42:58,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:58,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 22:42:58,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:42:58,294 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:03,599 INFO L93 Difference]: Finished difference Result 2490 states and 5033 transitions. [2021-06-05 22:43:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:43:03,599 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:03,601 INFO L225 Difference]: With dead ends: 2490 [2021-06-05 22:43:03,601 INFO L226 Difference]: Without dead ends: 2398 [2021-06-05 22:43:03,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2485.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:43:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-06-05 22:43:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1439. [2021-06-05 22:43:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.0180806675938805) internal successors, (2902), 1438 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2902 transitions. [2021-06-05 22:43:03,615 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2902 transitions. Word has length 36 [2021-06-05 22:43:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:03,615 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 2902 transitions. [2021-06-05 22:43:03,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2902 transitions. [2021-06-05 22:43:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:03,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:03,617 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:03,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:03,817 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:03,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:03,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1925362883, now seen corresponding path program 67 times [2021-06-05 22:43:03,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:03,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913596261] [2021-06-05 22:43:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:04,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:04,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913596261] [2021-06-05 22:43:04,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913596261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:04,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914224268] [2021-06-05 22:43:04,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:04,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:04,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:04,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:04,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:04,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:04,796 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 89 treesize of output 37 [2021-06-05 22:43:04,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:04,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:04,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:04,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:04,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914224268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:04,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:04,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 22:43:04,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547049336] [2021-06-05 22:43:04,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 22:43:04,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 22:43:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:04,839 INFO L87 Difference]: Start difference. First operand 1439 states and 2902 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:05,336 INFO L93 Difference]: Finished difference Result 2160 states and 4385 transitions. [2021-06-05 22:43:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:43:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:05,339 INFO L225 Difference]: With dead ends: 2160 [2021-06-05 22:43:05,339 INFO L226 Difference]: Without dead ends: 2137 [2021-06-05 22:43:05,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 859.2ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:43:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-06-05 22:43:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1445. [2021-06-05 22:43:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.018698060941828) internal successors, (2915), 1444 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2915 transitions. [2021-06-05 22:43:05,352 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2915 transitions. Word has length 36 [2021-06-05 22:43:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:05,352 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 2915 transitions. [2021-06-05 22:43:05,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2915 transitions. [2021-06-05 22:43:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:05,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:05,354 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:05,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:05,554 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash -325263507, now seen corresponding path program 68 times [2021-06-05 22:43:05,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:05,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278814832] [2021-06-05 22:43:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:05,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:05,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278814832] [2021-06-05 22:43:05,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278814832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:05,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46905266] [2021-06-05 22:43:05,814 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 [2021-06-05 22:43:05,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:05,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:05,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:05,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:06,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:06,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:06,308 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 89 treesize of output 37 [2021-06-05 22:43:06,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:06,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:06,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:06,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:06,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46905266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:06,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:06,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 22:43:06,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819017232] [2021-06-05 22:43:06,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:43:06,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:06,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:43:06,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:06,326 INFO L87 Difference]: Start difference. First operand 1445 states and 2915 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:06,871 INFO L93 Difference]: Finished difference Result 2272 states and 4614 transitions. [2021-06-05 22:43:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:43:06,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:06,874 INFO L225 Difference]: With dead ends: 2272 [2021-06-05 22:43:06,874 INFO L226 Difference]: Without dead ends: 2213 [2021-06-05 22:43:06,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 583.3ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-06-05 22:43:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1517. [2021-06-05 22:43:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.0118733509234827) internal successors, (3050), 1516 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 3050 transitions. [2021-06-05 22:43:06,895 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 3050 transitions. Word has length 36 [2021-06-05 22:43:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:06,895 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 3050 transitions. [2021-06-05 22:43:06,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 3050 transitions. [2021-06-05 22:43:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:06,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:06,897 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:07,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 22:43:07,121 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 214571523, now seen corresponding path program 69 times [2021-06-05 22:43:07,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:07,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874319224] [2021-06-05 22:43:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:07,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:07,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874319224] [2021-06-05 22:43:07,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874319224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:07,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764059960] [2021-06-05 22:43:07,384 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 [2021-06-05 22:43:07,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:43:07,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:07,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:07,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:07,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:07,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:07,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:07,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:07,900 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 89 treesize of output 37 [2021-06-05 22:43:07,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:07,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:07,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:07,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:07,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764059960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:07,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:07,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:43:07,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784741111] [2021-06-05 22:43:07,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:43:07,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:07,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:43:07,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:07,920 INFO L87 Difference]: Start difference. First operand 1517 states and 3050 transitions. Second operand has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:08,450 INFO L93 Difference]: Finished difference Result 2702 states and 5500 transitions. [2021-06-05 22:43:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:43:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) 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) Word has length 36 [2021-06-05 22:43:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:08,453 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 22:43:08,453 INFO L226 Difference]: Without dead ends: 2605 [2021-06-05 22:43:08,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-06-05 22:43:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1571. [2021-06-05 22:43:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-06-05 22:43:08,473 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-06-05 22:43:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:08,473 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-06-05 22:43:08,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-06-05 22:43:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:08,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:08,474 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:08,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:08,675 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2059242643, now seen corresponding path program 70 times [2021-06-05 22:43:08,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:08,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963658961] [2021-06-05 22:43:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:08,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:08,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963658961] [2021-06-05 22:43:08,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963658961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892223938] [2021-06-05 22:43:08,898 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 [2021-06-05 22:43:08,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:08,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:08,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:09,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:09,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:09,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:09,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:09,409 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 89 treesize of output 37 [2021-06-05 22:43:09,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:09,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:09,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:09,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:09,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892223938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:09,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:09,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:43:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350287282] [2021-06-05 22:43:09,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:43:09,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:09,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:43:09,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:09,427 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:09,777 INFO L93 Difference]: Finished difference Result 2210 states and 4470 transitions. [2021-06-05 22:43:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:43:09,777 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) 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) Word has length 36 [2021-06-05 22:43:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:09,779 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 22:43:09,779 INFO L226 Difference]: Without dead ends: 2188 [2021-06-05 22:43:09,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 567.0ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-06-05 22:43:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1571. [2021-06-05 22:43:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-06-05 22:43:09,794 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-06-05 22:43:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:09,794 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-06-05 22:43:09,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-06-05 22:43:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:09,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:09,795 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:09,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:09,997 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash -729133199, now seen corresponding path program 71 times [2021-06-05 22:43:09,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:09,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052509885] [2021-06-05 22:43:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:43:10,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:10,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052509885] [2021-06-05 22:43:10,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052509885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:10,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164084887] [2021-06-05 22:43:10,267 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 [2021-06-05 22:43:10,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:43:10,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:10,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 22:43:10,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:10,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:10,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:10,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:10,856 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 89 treesize of output 37 [2021-06-05 22:43:10,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:10,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:10,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:10,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:10,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164084887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:10,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:10,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 22:43:10,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453214958] [2021-06-05 22:43:10,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:43:10,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:10,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:43:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:10,874 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:11,382 INFO L93 Difference]: Finished difference Result 2485 states and 5026 transitions. [2021-06-05 22:43:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:43:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:11,384 INFO L225 Difference]: With dead ends: 2485 [2021-06-05 22:43:11,385 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 22:43:11,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 777.7ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 22:43:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1582. [2021-06-05 22:43:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.001897533206831) internal successors, (3165), 1581 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3165 transitions. [2021-06-05 22:43:11,399 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3165 transitions. Word has length 36 [2021-06-05 22:43:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:11,400 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3165 transitions. [2021-06-05 22:43:11,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3165 transitions. [2021-06-05 22:43:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:11,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:11,402 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:11,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:11,615 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:11,615 INFO L82 PathProgramCache]: Analyzing trace with hash 103525963, now seen corresponding path program 72 times [2021-06-05 22:43:11,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:11,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111187786] [2021-06-05 22:43:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:11,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:11,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111187786] [2021-06-05 22:43:11,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111187786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:11,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28153621] [2021-06-05 22:43:11,871 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 [2021-06-05 22:43:11,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:43:11,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:11,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:11,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:12,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:12,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:12,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:12,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:12,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:12,382 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 89 treesize of output 37 [2021-06-05 22:43:12,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:12,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:12,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:12,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:12,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28153621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:12,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:12,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:12,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047738411] [2021-06-05 22:43:12,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:12,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:12,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:12,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:12,400 INFO L87 Difference]: Start difference. First operand 1582 states and 3165 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:12,787 INFO L93 Difference]: Finished difference Result 2739 states and 5530 transitions. [2021-06-05 22:43:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:12,787 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:12,789 INFO L225 Difference]: With dead ends: 2739 [2021-06-05 22:43:12,789 INFO L226 Difference]: Without dead ends: 2676 [2021-06-05 22:43:12,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-05 22:43:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1621. [2021-06-05 22:43:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.0) internal successors, (3240), 1620 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3240 transitions. [2021-06-05 22:43:12,805 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3240 transitions. Word has length 36 [2021-06-05 22:43:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:12,805 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3240 transitions. [2021-06-05 22:43:12,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3240 transitions. [2021-06-05 22:43:12,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:12,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:12,806 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:13,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 22:43:13,007 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:13,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2124679093, now seen corresponding path program 73 times [2021-06-05 22:43:13,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:13,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075781861] [2021-06-05 22:43:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:13,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:13,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075781861] [2021-06-05 22:43:13,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075781861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:13,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896212539] [2021-06-05 22:43:13,264 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 [2021-06-05 22:43:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:13,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:13,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:13,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:13,778 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 89 treesize of output 37 [2021-06-05 22:43:13,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:13,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:13,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:13,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:13,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896212539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:13,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:13,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:13,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722429281] [2021-06-05 22:43:13,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:13,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:13,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:13,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:13,796 INFO L87 Difference]: Start difference. First operand 1621 states and 3240 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:14,418 INFO L93 Difference]: Finished difference Result 2343 states and 4717 transitions. [2021-06-05 22:43:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:43:14,418 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:14,420 INFO L225 Difference]: With dead ends: 2343 [2021-06-05 22:43:14,420 INFO L226 Difference]: Without dead ends: 2321 [2021-06-05 22:43:14,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 623.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-06-05 22:43:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1627. [2021-06-05 22:43:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-06-05 22:43:14,435 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-06-05 22:43:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:14,435 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-06-05 22:43:14,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-06-05 22:43:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:14,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:14,437 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:14,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:14,637 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:14,638 INFO L82 PathProgramCache]: Analyzing trace with hash 573047853, now seen corresponding path program 74 times [2021-06-05 22:43:14,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:14,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975154713] [2021-06-05 22:43:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:14,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:14,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975154713] [2021-06-05 22:43:14,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975154713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:14,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15937002] [2021-06-05 22:43:14,939 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 [2021-06-05 22:43:14,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:14,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:14,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 22:43:14,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:15,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:15,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:15,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:15,499 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 91 treesize of output 37 [2021-06-05 22:43:15,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:15,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:15,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:15,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 22:43:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:15,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15937002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:15,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:15,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:15,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900900490] [2021-06-05 22:43:15,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:15,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:15,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:15,517 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:15,930 INFO L93 Difference]: Finished difference Result 2287 states and 4610 transitions. [2021-06-05 22:43:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:43:15,930 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:15,932 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 22:43:15,932 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 22:43:15,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 695.6ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 22:43:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1627. [2021-06-05 22:43:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-06-05 22:43:15,946 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-06-05 22:43:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:15,946 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-06-05 22:43:15,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-06-05 22:43:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:15,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:15,948 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:16,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 22:43:16,148 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1638712185, now seen corresponding path program 75 times [2021-06-05 22:43:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:16,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822586849] [2021-06-05 22:43:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:43:16,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:16,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822586849] [2021-06-05 22:43:16,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822586849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:16,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776438961] [2021-06-05 22:43:16,372 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 [2021-06-05 22:43:16,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:43:16,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:16,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:16,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:16,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:16,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:16,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,858 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 89 treesize of output 37 [2021-06-05 22:43:16,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:16,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:16,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:16,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:16,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776438961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:16,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:16,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 22:43:16,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727577273] [2021-06-05 22:43:16,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:43:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:43:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:16,876 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:17,247 INFO L93 Difference]: Finished difference Result 2567 states and 5154 transitions. [2021-06-05 22:43:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:43:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:17,250 INFO L225 Difference]: With dead ends: 2567 [2021-06-05 22:43:17,250 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 22:43:17,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 655.0ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 22:43:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1699. [2021-06-05 22:43:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.9976442873969376) internal successors, (3392), 1698 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3392 transitions. [2021-06-05 22:43:17,265 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3392 transitions. Word has length 36 [2021-06-05 22:43:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:17,265 INFO L482 AbstractCegarLoop]: Abstraction has 1699 states and 3392 transitions. [2021-06-05 22:43:17,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3392 transitions. [2021-06-05 22:43:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:17,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:17,267 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:17,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:17,468 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1182283007, now seen corresponding path program 76 times [2021-06-05 22:43:17,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:17,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334244449] [2021-06-05 22:43:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:17,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:17,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334244449] [2021-06-05 22:43:17,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334244449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:17,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737722438] [2021-06-05 22:43:17,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:17,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:17,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:17,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:17,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:18,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:18,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:18,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:18,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:18,218 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 89 treesize of output 37 [2021-06-05 22:43:18,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:18,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:18,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:18,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:18,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737722438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:18,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:18,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:43:18,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129647148] [2021-06-05 22:43:18,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:43:18,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:18,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:43:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:18,239 INFO L87 Difference]: Start difference. First operand 1699 states and 3392 transitions. Second operand has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:18,617 INFO L93 Difference]: Finished difference Result 3110 states and 6274 transitions. [2021-06-05 22:43:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:43:18,617 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) 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) Word has length 36 [2021-06-05 22:43:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:18,620 INFO L225 Difference]: With dead ends: 3110 [2021-06-05 22:43:18,620 INFO L226 Difference]: Without dead ends: 3051 [2021-06-05 22:43:18,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:18,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-05 22:43:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 1690. [2021-06-05 22:43:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.9964476021314388) internal successors, (3372), 1689 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3372 transitions. [2021-06-05 22:43:18,637 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3372 transitions. Word has length 36 [2021-06-05 22:43:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:18,637 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 3372 transitions. [2021-06-05 22:43:18,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3372 transitions. [2021-06-05 22:43:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:18,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:18,639 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:18,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:18,840 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash -806053023, now seen corresponding path program 77 times [2021-06-05 22:43:18,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:18,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084167144] [2021-06-05 22:43:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:19,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084167144] [2021-06-05 22:43:19,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084167144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456854198] [2021-06-05 22:43:19,083 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 [2021-06-05 22:43:19,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:43:19,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:19,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:19,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:19,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:19,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:19,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:19,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:19,612 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 89 treesize of output 37 [2021-06-05 22:43:19,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:19,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:19,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:19,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:19,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456854198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:19,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:19,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:19,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069971274] [2021-06-05 22:43:19,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:19,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:19,630 INFO L87 Difference]: Start difference. First operand 1690 states and 3372 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:19,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:19,920 INFO L93 Difference]: Finished difference Result 2909 states and 5872 transitions. [2021-06-05 22:43:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:19,921 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:19,923 INFO L225 Difference]: With dead ends: 2909 [2021-06-05 22:43:19,923 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 22:43:19,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 22:43:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1717. [2021-06-05 22:43:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 1.9965034965034965) internal successors, (3426), 1716 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3426 transitions. [2021-06-05 22:43:19,939 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3426 transitions. Word has length 36 [2021-06-05 22:43:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:19,939 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 3426 transitions. [2021-06-05 22:43:19,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3426 transitions. [2021-06-05 22:43:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:19,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:19,941 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:20,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:20,141 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:20,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1215100107, now seen corresponding path program 78 times [2021-06-05 22:43:20,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:20,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87711270] [2021-06-05 22:43:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:20,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:20,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87711270] [2021-06-05 22:43:20,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87711270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:20,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925702402] [2021-06-05 22:43:20,436 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 [2021-06-05 22:43:20,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:43:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:20,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:20,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:20,969 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 89 treesize of output 37 [2021-06-05 22:43:20,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:20,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:20,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:20,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:20,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925702402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:20,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:20,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:20,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059095849] [2021-06-05 22:43:20,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:20,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:20,992 INFO L87 Difference]: Start difference. First operand 1717 states and 3426 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:21,409 INFO L93 Difference]: Finished difference Result 2369 states and 4761 transitions. [2021-06-05 22:43:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:43:21,410 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:21,412 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 22:43:21,412 INFO L226 Difference]: Without dead ends: 2347 [2021-06-05 22:43:21,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 665.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-06-05 22:43:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1726. [2021-06-05 22:43:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-06-05 22:43:21,433 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-06-05 22:43:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:21,433 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-06-05 22:43:21,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-06-05 22:43:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:21,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:21,435 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:21,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:21,635 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash -336531133, now seen corresponding path program 79 times [2021-06-05 22:43:21,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:21,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119233538] [2021-06-05 22:43:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:21,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:21,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119233538] [2021-06-05 22:43:21,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119233538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:21,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181810694] [2021-06-05 22:43:21,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:21,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:21,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:22,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:22,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:22,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:22,525 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 89 treesize of output 37 [2021-06-05 22:43:22,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:22,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:22,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:22,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:22,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181810694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:22,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:22,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:22,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383180193] [2021-06-05 22:43:22,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:22,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:22,549 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:22,922 INFO L93 Difference]: Finished difference Result 2328 states and 4682 transitions. [2021-06-05 22:43:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:43:22,923 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:22,924 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 22:43:22,924 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 22:43:22,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 22:43:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1726. [2021-06-05 22:43:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-06-05 22:43:22,945 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-06-05 22:43:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:22,945 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-06-05 22:43:22,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-06-05 22:43:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:22,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:22,948 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:23,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:23,161 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash 666409005, now seen corresponding path program 80 times [2021-06-05 22:43:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:23,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532020335] [2021-06-05 22:43:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:23,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532020335] [2021-06-05 22:43:23,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532020335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:23,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648487673] [2021-06-05 22:43:23,404 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 [2021-06-05 22:43:23,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:23,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:23,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 22:43:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:23,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:23,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:23,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:23,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:23,918 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 91 treesize of output 37 [2021-06-05 22:43:23,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:23,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:23,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:23,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 22:43:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:23,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648487673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:23,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:23,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:23,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233941440] [2021-06-05 22:43:23,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:23,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:23,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:23,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:23,937 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:24,528 INFO L93 Difference]: Finished difference Result 2252 states and 4526 transitions. [2021-06-05 22:43:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:43:24,528 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:24,530 INFO L225 Difference]: With dead ends: 2252 [2021-06-05 22:43:24,530 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 22:43:24,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 22:43:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1729. [2021-06-05 22:43:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.9965277777777777) internal successors, (3450), 1728 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 3450 transitions. [2021-06-05 22:43:24,548 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 3450 transitions. Word has length 36 [2021-06-05 22:43:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:24,548 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 3450 transitions. [2021-06-05 22:43:24,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 3450 transitions. [2021-06-05 22:43:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:24,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:24,550 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:24,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:24,765 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:24,765 INFO L82 PathProgramCache]: Analyzing trace with hash -30986797, now seen corresponding path program 81 times [2021-06-05 22:43:24,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:24,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330310275] [2021-06-05 22:43:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:43:25,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:25,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330310275] [2021-06-05 22:43:25,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330310275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:25,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405004828] [2021-06-05 22:43:25,039 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 [2021-06-05 22:43:25,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:43:25,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:25,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:25,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:25,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:25,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:25,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:25,555 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 89 treesize of output 37 [2021-06-05 22:43:25,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:25,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:25,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:25,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:25,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405004828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:25,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:25,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 22:43:25,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046500841] [2021-06-05 22:43:25,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:25,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:25,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:25,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:25,596 INFO L87 Difference]: Start difference. First operand 1729 states and 3450 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:26,154 INFO L93 Difference]: Finished difference Result 3640 states and 7355 transitions. [2021-06-05 22:43:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:26,155 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:26,158 INFO L225 Difference]: With dead ends: 3640 [2021-06-05 22:43:26,158 INFO L226 Difference]: Without dead ends: 3597 [2021-06-05 22:43:26,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 750.4ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:43:26,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-06-05 22:43:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 1800. [2021-06-05 22:43:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 1.991106170094497) internal successors, (3582), 1799 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3582 transitions. [2021-06-05 22:43:26,178 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3582 transitions. Word has length 36 [2021-06-05 22:43:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:26,178 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 3582 transitions. [2021-06-05 22:43:26,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3582 transitions. [2021-06-05 22:43:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:26,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:26,180 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:26,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:26,380 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash 564785227, now seen corresponding path program 82 times [2021-06-05 22:43:26,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:26,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677387707] [2021-06-05 22:43:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:26,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:26,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677387707] [2021-06-05 22:43:26,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677387707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:26,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467820722] [2021-06-05 22:43:26,693 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 [2021-06-05 22:43:26,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:26,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:26,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:26,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:27,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:27,286 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 89 treesize of output 37 [2021-06-05 22:43:27,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:27,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:27,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:27,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:27,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467820722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:27,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:27,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 22:43:27,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676581214] [2021-06-05 22:43:27,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 22:43:27,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:27,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 22:43:27,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:27,328 INFO L87 Difference]: Start difference. First operand 1800 states and 3582 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:28,027 INFO L93 Difference]: Finished difference Result 3718 states and 7520 transitions. [2021-06-05 22:43:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:43:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:28,031 INFO L225 Difference]: With dead ends: 3718 [2021-06-05 22:43:28,031 INFO L226 Difference]: Without dead ends: 3670 [2021-06-05 22:43:28,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:43:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-06-05 22:43:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 1884. [2021-06-05 22:43:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 1.9867233138608604) internal successors, (3741), 1883 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 3741 transitions. [2021-06-05 22:43:28,062 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 3741 transitions. Word has length 36 [2021-06-05 22:43:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:28,063 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 3741 transitions. [2021-06-05 22:43:28,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 3741 transitions. [2021-06-05 22:43:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:28,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:28,065 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:28,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 22:43:28,281 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash 453739667, now seen corresponding path program 83 times [2021-06-05 22:43:28,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:28,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994858655] [2021-06-05 22:43:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:28,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:28,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994858655] [2021-06-05 22:43:28,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994858655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:28,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33244788] [2021-06-05 22:43:28,560 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 [2021-06-05 22:43:28,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:43:28,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:28,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 22:43:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:29,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:29,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:29,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:29,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:29,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:29,110 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 89 treesize of output 37 [2021-06-05 22:43:29,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:29,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:29,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:29,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:29,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33244788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:29,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:29,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 22:43:29,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640953720] [2021-06-05 22:43:29,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 22:43:29,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 22:43:29,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:29,152 INFO L87 Difference]: Start difference. First operand 1884 states and 3741 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:30,062 INFO L93 Difference]: Finished difference Result 3721 states and 7510 transitions. [2021-06-05 22:43:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:43:30,063 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:30,067 INFO L225 Difference]: With dead ends: 3721 [2021-06-05 22:43:30,067 INFO L226 Difference]: Without dead ends: 3678 [2021-06-05 22:43:30,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 836.3ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:43:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-06-05 22:43:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 1956. [2021-06-05 22:43:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.984143222506394) internal successors, (3879), 1955 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3879 transitions. [2021-06-05 22:43:30,088 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3879 transitions. Word has length 36 [2021-06-05 22:43:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:30,088 INFO L482 AbstractCegarLoop]: Abstraction has 1956 states and 3879 transitions. [2021-06-05 22:43:30,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3879 transitions. [2021-06-05 22:43:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:30,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:30,091 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:30,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:30,293 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:30,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1097891573, now seen corresponding path program 84 times [2021-06-05 22:43:30,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:30,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834583859] [2021-06-05 22:43:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:30,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:30,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834583859] [2021-06-05 22:43:30,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834583859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:30,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989809458] [2021-06-05 22:43:30,571 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 [2021-06-05 22:43:30,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:43:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:30,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:31,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:31,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:31,116 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 89 treesize of output 37 [2021-06-05 22:43:31,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:31,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:31,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:31,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:31,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989809458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:31,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:31,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 22:43:31,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142815034] [2021-06-05 22:43:31,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 22:43:31,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 22:43:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:31,158 INFO L87 Difference]: Start difference. First operand 1956 states and 3879 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:31,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:31,961 INFO L93 Difference]: Finished difference Result 3689 states and 7457 transitions. [2021-06-05 22:43:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:43:31,961 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:31,964 INFO L225 Difference]: With dead ends: 3689 [2021-06-05 22:43:31,964 INFO L226 Difference]: Without dead ends: 3644 [2021-06-05 22:43:31,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 831.9ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:43:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-06-05 22:43:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 1973. [2021-06-05 22:43:31,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.9852941176470589) internal successors, (3915), 1972 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 3915 transitions. [2021-06-05 22:43:31,984 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 3915 transitions. Word has length 36 [2021-06-05 22:43:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:31,984 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 3915 transitions. [2021-06-05 22:43:31,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 3915 transitions. [2021-06-05 22:43:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:31,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:31,985 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:32,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 22:43:32,189 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash -787529803, now seen corresponding path program 85 times [2021-06-05 22:43:32,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:32,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938370425] [2021-06-05 22:43:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:32,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:32,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938370425] [2021-06-05 22:43:32,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938370425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:32,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598951220] [2021-06-05 22:43:32,451 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 [2021-06-05 22:43:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:32,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:33,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:33,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:33,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:33,078 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 89 treesize of output 37 [2021-06-05 22:43:33,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:33,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:33,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:33,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:33,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598951220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:33,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:33,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:43:33,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338513658] [2021-06-05 22:43:33,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:43:33,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:43:33,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:33,096 INFO L87 Difference]: Start difference. First operand 1973 states and 3915 transitions. Second operand has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:33,507 INFO L93 Difference]: Finished difference Result 3068 states and 6162 transitions. [2021-06-05 22:43:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:43:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) 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) Word has length 36 [2021-06-05 22:43:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:33,510 INFO L225 Difference]: With dead ends: 3068 [2021-06-05 22:43:33,510 INFO L226 Difference]: Without dead ends: 3006 [2021-06-05 22:43:33,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 717.1ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-06-05 22:43:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1967. [2021-06-05 22:43:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 1.9852492370295016) internal successors, (3903), 1966 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3903 transitions. [2021-06-05 22:43:33,536 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3903 transitions. Word has length 36 [2021-06-05 22:43:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:33,536 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 3903 transitions. [2021-06-05 22:43:33,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3903 transitions. [2021-06-05 22:43:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:33,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:33,538 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:33,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:33,753 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash -898575363, now seen corresponding path program 86 times [2021-06-05 22:43:33,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:33,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275866744] [2021-06-05 22:43:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:34,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:34,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275866744] [2021-06-05 22:43:34,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275866744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:34,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778116958] [2021-06-05 22:43:34,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:34,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:34,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:34,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:34,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:34,546 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 89 treesize of output 37 [2021-06-05 22:43:34,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:34,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:34,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:34,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:34,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778116958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:34,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:34,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:34,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313465454] [2021-06-05 22:43:34,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:34,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:34,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:34,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:34,573 INFO L87 Difference]: Start difference. First operand 1967 states and 3903 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:35,186 INFO L93 Difference]: Finished difference Result 3053 states and 6129 transitions. [2021-06-05 22:43:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:35,189 INFO L225 Difference]: With dead ends: 3053 [2021-06-05 22:43:35,189 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 22:43:35,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:35,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 22:43:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1964. [2021-06-05 22:43:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 1.9852266938359653) internal successors, (3897), 1963 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 3897 transitions. [2021-06-05 22:43:35,206 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 3897 transitions. Word has length 36 [2021-06-05 22:43:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:35,206 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 3897 transitions. [2021-06-05 22:43:35,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 3897 transitions. [2021-06-05 22:43:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:35,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:35,208 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:35,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:35,408 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:35,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1844760693, now seen corresponding path program 87 times [2021-06-05 22:43:35,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:35,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835221148] [2021-06-05 22:43:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:35,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:35,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835221148] [2021-06-05 22:43:35,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835221148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:35,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997396255] [2021-06-05 22:43:35,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:35,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:43:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:35,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:35,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:36,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:36,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:36,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:36,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:36,201 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 89 treesize of output 37 [2021-06-05 22:43:36,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:36,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:36,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:36,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:36,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997396255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:36,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:36,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:36,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173671010] [2021-06-05 22:43:36,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:36,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:36,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:36,225 INFO L87 Difference]: Start difference. First operand 1964 states and 3897 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:36,551 INFO L93 Difference]: Finished difference Result 3170 states and 6381 transitions. [2021-06-05 22:43:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:36,551 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:36,554 INFO L225 Difference]: With dead ends: 3170 [2021-06-05 22:43:36,554 INFO L226 Difference]: Without dead ends: 3105 [2021-06-05 22:43:36,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 655.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-06-05 22:43:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 1988. [2021-06-05 22:43:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 1.9838953195772522) internal successors, (3942), 1987 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3942 transitions. [2021-06-05 22:43:36,573 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3942 transitions. Word has length 36 [2021-06-05 22:43:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:36,573 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 3942 transitions. [2021-06-05 22:43:36,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3942 transitions. [2021-06-05 22:43:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:36,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:36,575 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:36,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:36,775 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:36,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1808154349, now seen corresponding path program 88 times [2021-06-05 22:43:36,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:36,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656776897] [2021-06-05 22:43:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:37,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:37,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656776897] [2021-06-05 22:43:37,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656776897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:37,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476752047] [2021-06-05 22:43:37,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:37,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:37,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:37,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:37,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:37,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:37,587 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 89 treesize of output 37 [2021-06-05 22:43:37,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:37,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:37,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:37,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:37,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476752047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:37,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:37,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:37,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291669199] [2021-06-05 22:43:37,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:37,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:37,607 INFO L87 Difference]: Start difference. First operand 1988 states and 3942 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:38,377 INFO L93 Difference]: Finished difference Result 3044 states and 6092 transitions. [2021-06-05 22:43:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:38,377 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:38,379 INFO L225 Difference]: With dead ends: 3044 [2021-06-05 22:43:38,379 INFO L226 Difference]: Without dead ends: 3002 [2021-06-05 22:43:38,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 663.5ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-06-05 22:43:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 1982. [2021-06-05 22:43:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-06-05 22:43:38,397 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-06-05 22:43:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:38,397 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-06-05 22:43:38,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-06-05 22:43:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:38,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:38,399 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:38,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:38,599 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:38,599 INFO L82 PathProgramCache]: Analyzing trace with hash 935181707, now seen corresponding path program 89 times [2021-06-05 22:43:38,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:38,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865900664] [2021-06-05 22:43:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:38,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:38,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865900664] [2021-06-05 22:43:38,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865900664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:38,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779743933] [2021-06-05 22:43:38,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:38,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:43:38,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:38,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:38,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:39,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:39,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:39,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:39,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:39,395 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 89 treesize of output 37 [2021-06-05 22:43:39,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:39,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:39,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:39,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:39,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779743933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:39,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:39,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:39,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553057536] [2021-06-05 22:43:39,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:39,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:39,413 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:40,073 INFO L93 Difference]: Finished difference Result 2927 states and 5852 transitions. [2021-06-05 22:43:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:40,073 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:40,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:40,076 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 22:43:40,076 INFO L226 Difference]: Without dead ends: 2904 [2021-06-05 22:43:40,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-06-05 22:43:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1985. [2021-06-05 22:43:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 1.9838709677419355) internal successors, (3936), 1984 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3936 transitions. [2021-06-05 22:43:40,094 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3936 transitions. Word has length 36 [2021-06-05 22:43:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:40,094 INFO L482 AbstractCegarLoop]: Abstraction has 1985 states and 3936 transitions. [2021-06-05 22:43:40,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3936 transitions. [2021-06-05 22:43:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:40,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:40,095 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:40,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 22:43:40,296 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:40,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1938121845, now seen corresponding path program 90 times [2021-06-05 22:43:40,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:40,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912311764] [2021-06-05 22:43:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:40,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:40,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912311764] [2021-06-05 22:43:40,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912311764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:40,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931556235] [2021-06-05 22:43:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:40,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:43:40,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:40,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:41,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:41,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:41,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:41,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:41,126 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 89 treesize of output 37 [2021-06-05 22:43:41,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:41,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:41,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:41,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:41,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931556235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:41,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:41,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:41,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698738434] [2021-06-05 22:43:41,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:41,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:41,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:41,145 INFO L87 Difference]: Start difference. First operand 1985 states and 3936 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:41,610 INFO L93 Difference]: Finished difference Result 2935 states and 5869 transitions. [2021-06-05 22:43:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:41,612 INFO L225 Difference]: With dead ends: 2935 [2021-06-05 22:43:41,612 INFO L226 Difference]: Without dead ends: 2911 [2021-06-05 22:43:41,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 667.1ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-06-05 22:43:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1982. [2021-06-05 22:43:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-06-05 22:43:41,629 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-06-05 22:43:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:41,629 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-06-05 22:43:41,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-06-05 22:43:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:41,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:41,630 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:41,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:41,831 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:41,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1884098707, now seen corresponding path program 91 times [2021-06-05 22:43:41,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:41,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631060887] [2021-06-05 22:43:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:42,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:42,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631060887] [2021-06-05 22:43:42,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631060887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:42,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260473498] [2021-06-05 22:43:42,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:42,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:42,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:42,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:42,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:42,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:42,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:42,521 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 89 treesize of output 37 [2021-06-05 22:43:42,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:42,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:42,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:42,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:42,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260473498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:42,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:42,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 22:43:42,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934345353] [2021-06-05 22:43:42,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:43:42,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:42,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:43:42,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:42,539 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:42,997 INFO L93 Difference]: Finished difference Result 3201 states and 6417 transitions. [2021-06-05 22:43:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:43:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:43,000 INFO L225 Difference]: With dead ends: 3201 [2021-06-05 22:43:43,000 INFO L226 Difference]: Without dead ends: 3012 [2021-06-05 22:43:43,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-06-05 22:43:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2015. [2021-06-05 22:43:43,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.9821251241310824) internal successors, (3992), 2014 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 3992 transitions. [2021-06-05 22:43:43,017 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 3992 transitions. Word has length 36 [2021-06-05 22:43:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:43,017 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 3992 transitions. [2021-06-05 22:43:43,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 3992 transitions. [2021-06-05 22:43:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:43,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:43,018 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:43,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 22:43:43,219 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:43,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1940533323, now seen corresponding path program 92 times [2021-06-05 22:43:43,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:43,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679873516] [2021-06-05 22:43:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:43,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:43,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679873516] [2021-06-05 22:43:43,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679873516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:43,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524043426] [2021-06-05 22:43:43,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:43,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:43,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:43,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:43,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:43,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:43,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:43,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:43,924 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 89 treesize of output 37 [2021-06-05 22:43:43,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:43,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:43,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:43,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:43,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524043426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:43,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:43,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 22:43:43,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866800248] [2021-06-05 22:43:43,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:43:43,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:43,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:43:43,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:43,942 INFO L87 Difference]: Start difference. First operand 2015 states and 3992 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) [2021-06-05 22:43:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:44,579 INFO L93 Difference]: Finished difference Result 3283 states and 6567 transitions. [2021-06-05 22:43:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:43:44,579 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 36 [2021-06-05 22:43:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:44,581 INFO L225 Difference]: With dead ends: 3283 [2021-06-05 22:43:44,582 INFO L226 Difference]: Without dead ends: 3078 [2021-06-05 22:43:44,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 737.6ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:43:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-05 22:43:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2009. [2021-06-05 22:43:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 1.9810756972111554) internal successors, (3978), 2008 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3978 transitions. [2021-06-05 22:43:44,599 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3978 transitions. Word has length 36 [2021-06-05 22:43:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:44,599 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 3978 transitions. [2021-06-05 22:43:44,599 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) [2021-06-05 22:43:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3978 transitions. [2021-06-05 22:43:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:44,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:44,601 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:44,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:44,801 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:44,801 INFO L82 PathProgramCache]: Analyzing trace with hash 518734893, now seen corresponding path program 93 times [2021-06-05 22:43:44,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:44,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860281153] [2021-06-05 22:43:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:45,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:45,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860281153] [2021-06-05 22:43:45,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860281153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:45,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323431714] [2021-06-05 22:43:45,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:45,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:43:45,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:45,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:45,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:45,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:45,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:45,520 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 89 treesize of output 37 [2021-06-05 22:43:45,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:45,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:45,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:45,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:45,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323431714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:45,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:45,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:43:45,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834088815] [2021-06-05 22:43:45,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:43:45,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:45,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:43:45,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:45,538 INFO L87 Difference]: Start difference. First operand 2009 states and 3978 transitions. Second operand has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:46,124 INFO L93 Difference]: Finished difference Result 2891 states and 5824 transitions. [2021-06-05 22:43:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:43:46,128 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) 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) Word has length 36 [2021-06-05 22:43:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:46,131 INFO L225 Difference]: With dead ends: 2891 [2021-06-05 22:43:46,131 INFO L226 Difference]: Without dead ends: 2834 [2021-06-05 22:43:46,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 585.1ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-05 22:43:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2006. [2021-06-05 22:43:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 1.9810473815461347) internal successors, (3972), 2005 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3972 transitions. [2021-06-05 22:43:46,148 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3972 transitions. Word has length 36 [2021-06-05 22:43:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:46,148 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 3972 transitions. [2021-06-05 22:43:46,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3972 transitions. [2021-06-05 22:43:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:46,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:46,150 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:46,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:46,350 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1829487763, now seen corresponding path program 94 times [2021-06-05 22:43:46,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:46,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79502245] [2021-06-05 22:43:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:46,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:46,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79502245] [2021-06-05 22:43:46,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79502245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:46,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053274938] [2021-06-05 22:43:46,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:46,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:46,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:46,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:47,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:47,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:47,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:47,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:47,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:47,186 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 89 treesize of output 37 [2021-06-05 22:43:47,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:47,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:47,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:47,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:47,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053274938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:47,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:47,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:43:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217498415] [2021-06-05 22:43:47,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:43:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:47,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:43:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:47,204 INFO L87 Difference]: Start difference. First operand 2006 states and 3972 transitions. Second operand has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:48,072 INFO L93 Difference]: Finished difference Result 3270 states and 6540 transitions. [2021-06-05 22:43:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:43:48,073 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) 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) Word has length 36 [2021-06-05 22:43:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:48,076 INFO L225 Difference]: With dead ends: 3270 [2021-06-05 22:43:48,076 INFO L226 Difference]: Without dead ends: 3074 [2021-06-05 22:43:48,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 903.9ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:43:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-06-05 22:43:48,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2030. [2021-06-05 22:43:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.9817644159684573) internal successors, (4021), 2029 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 4021 transitions. [2021-06-05 22:43:48,101 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 4021 transitions. Word has length 36 [2021-06-05 22:43:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:48,102 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 4021 transitions. [2021-06-05 22:43:48,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 4021 transitions. [2021-06-05 22:43:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:48,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:48,104 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:48,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 22:43:48,308 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash 407689333, now seen corresponding path program 95 times [2021-06-05 22:43:48,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:48,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013632777] [2021-06-05 22:43:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:48,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:48,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013632777] [2021-06-05 22:43:48,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013632777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:48,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009641014] [2021-06-05 22:43:48,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:48,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:43:48,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:48,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:49,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:49,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:49,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:49,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:49,084 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 89 treesize of output 37 [2021-06-05 22:43:49,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:49,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:49,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:49,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:49,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009641014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:49,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:49,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:49,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381582] [2021-06-05 22:43:49,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:49,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:49,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:49,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:49,102 INFO L87 Difference]: Start difference. First operand 2030 states and 4021 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:49,635 INFO L93 Difference]: Finished difference Result 3018 states and 6082 transitions. [2021-06-05 22:43:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:43:49,636 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:49,638 INFO L225 Difference]: With dead ends: 3018 [2021-06-05 22:43:49,638 INFO L226 Difference]: Without dead ends: 2956 [2021-06-05 22:43:49,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-06-05 22:43:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2051. [2021-06-05 22:43:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-06-05 22:43:49,656 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-06-05 22:43:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:49,656 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-06-05 22:43:49,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-06-05 22:43:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:49,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:49,658 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:49,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 22:43:49,858 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1143941907, now seen corresponding path program 96 times [2021-06-05 22:43:49,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:49,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550935734] [2021-06-05 22:43:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:50,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:50,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550935734] [2021-06-05 22:43:50,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550935734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:50,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992919511] [2021-06-05 22:43:50,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:50,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:43:50,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:50,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 22:43:50,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:50,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:50,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:50,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:50,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:50,703 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 91 treesize of output 37 [2021-06-05 22:43:50,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:50,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:50,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:50,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 22:43:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:50,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992919511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:50,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:50,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:50,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627574021] [2021-06-05 22:43:50,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:50,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:50,721 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:51,036 INFO L93 Difference]: Finished difference Result 2747 states and 5507 transitions. [2021-06-05 22:43:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:43:51,037 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:51,039 INFO L225 Difference]: With dead ends: 2747 [2021-06-05 22:43:51,039 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 22:43:51,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 703.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 22:43:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2051. [2021-06-05 22:43:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-06-05 22:43:51,056 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-06-05 22:43:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:51,056 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-06-05 22:43:51,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-06-05 22:43:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:51,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:51,058 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:51,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:51,259 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:51,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:51,259 INFO L82 PathProgramCache]: Analyzing trace with hash 939265351, now seen corresponding path program 97 times [2021-06-05 22:43:51,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:51,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774143048] [2021-06-05 22:43:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:43:51,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:51,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774143048] [2021-06-05 22:43:51,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774143048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:51,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381479249] [2021-06-05 22:43:51,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:51,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:51,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:51,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:51,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:51,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:51,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:51,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:52,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:52,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:52,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:52,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:52,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:52,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:52,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:52,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:52,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:52,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:52,006 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 89 treesize of output 37 [2021-06-05 22:43:52,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:52,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:52,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:52,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:52,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381479249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:52,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:52,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 22:43:52,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864781018] [2021-06-05 22:43:52,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:43:52,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:52,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:43:52,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:52,024 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:52,420 INFO L93 Difference]: Finished difference Result 3042 states and 6095 transitions. [2021-06-05 22:43:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:43:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:52,423 INFO L225 Difference]: With dead ends: 3042 [2021-06-05 22:43:52,423 INFO L226 Difference]: Without dead ends: 2834 [2021-06-05 22:43:52,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 700.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-05 22:43:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2141. [2021-06-05 22:43:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 1.983177570093458) internal successors, (4244), 2140 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 4244 transitions. [2021-06-05 22:43:52,441 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 4244 transitions. Word has length 36 [2021-06-05 22:43:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:52,441 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 4244 transitions. [2021-06-05 22:43:52,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 4244 transitions. [2021-06-05 22:43:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:52,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:52,443 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:52,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 22:43:52,645 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash -534706753, now seen corresponding path program 98 times [2021-06-05 22:43:52,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:52,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079713364] [2021-06-05 22:43:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:52,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079713364] [2021-06-05 22:43:52,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079713364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158245419] [2021-06-05 22:43:52,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:52,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:52,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:53,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:53,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:53,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:53,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:53,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:53,418 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 89 treesize of output 37 [2021-06-05 22:43:53,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:53,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:53,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:53,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:53,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158245419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:53,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:53,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:43:53,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292802142] [2021-06-05 22:43:53,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:43:53,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:43:53,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:53,442 INFO L87 Difference]: Start difference. First operand 2141 states and 4244 transitions. Second operand has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:54,026 INFO L93 Difference]: Finished difference Result 3881 states and 7802 transitions. [2021-06-05 22:43:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:43:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) 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) Word has length 36 [2021-06-05 22:43:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:54,029 INFO L225 Difference]: With dead ends: 3881 [2021-06-05 22:43:54,029 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 22:43:54,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 22:43:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2072. [2021-06-05 22:43:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 1.981651376146789) internal successors, (4104), 2071 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 4104 transitions. [2021-06-05 22:43:54,051 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 4104 transitions. Word has length 36 [2021-06-05 22:43:54,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:54,051 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 4104 transitions. [2021-06-05 22:43:54,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:43:54,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 4104 transitions. [2021-06-05 22:43:54,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:54,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:54,052 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:54,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 22:43:54,253 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash -501889653, now seen corresponding path program 99 times [2021-06-05 22:43:54,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:54,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100224916] [2021-06-05 22:43:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:54,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100224916] [2021-06-05 22:43:54,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100224916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787881817] [2021-06-05 22:43:54,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:54,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:43:54,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:54,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:55,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:55,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:55,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 22:43:55,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:55,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:55,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:55,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:55,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787881817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:55,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:55,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:55,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065819100] [2021-06-05 22:43:55,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:55,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:55,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:55,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:55,066 INFO L87 Difference]: Start difference. First operand 2072 states and 4104 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:55,497 INFO L93 Difference]: Finished difference Result 3168 states and 6373 transitions. [2021-06-05 22:43:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:43:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:55,500 INFO L225 Difference]: With dead ends: 3168 [2021-06-05 22:43:55,500 INFO L226 Difference]: Without dead ends: 3111 [2021-06-05 22:43:55,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-06-05 22:43:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2114. [2021-06-05 22:43:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-05 22:43:55,518 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-05 22:43:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:55,518 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-05 22:43:55,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-05 22:43:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:55,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:55,520 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:55,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 22:43:55,721 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2053520893, now seen corresponding path program 100 times [2021-06-05 22:43:55,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:55,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859017972] [2021-06-05 22:43:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:56,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:56,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859017972] [2021-06-05 22:43:56,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859017972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:56,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085318297] [2021-06-05 22:43:56,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:56,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:56,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:56,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:56,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:56,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:56,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:56,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:56,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:56,554 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 89 treesize of output 37 [2021-06-05 22:43:56,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:56,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:56,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:56,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:56,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085318297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:56,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:56,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:56,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339596324] [2021-06-05 22:43:56,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:56,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:56,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:56,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:56,571 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:56,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:56,909 INFO L93 Difference]: Finished difference Result 2764 states and 5529 transitions. [2021-06-05 22:43:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:43:56,909 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:56,911 INFO L225 Difference]: With dead ends: 2764 [2021-06-05 22:43:56,911 INFO L226 Difference]: Without dead ends: 2741 [2021-06-05 22:43:56,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 676.3ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-06-05 22:43:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2114. [2021-06-05 22:43:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-05 22:43:56,932 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-05 22:43:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:56,932 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-05 22:43:56,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-05 22:43:56,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:56,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:56,935 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:57,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:57,148 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1050580755, now seen corresponding path program 101 times [2021-06-05 22:43:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:57,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735733860] [2021-06-05 22:43:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:57,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:57,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735733860] [2021-06-05 22:43:57,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735733860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:57,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797437569] [2021-06-05 22:43:57,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:57,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:43:57,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:57,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:43:57,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:57,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:57,949 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 89 treesize of output 37 [2021-06-05 22:43:57,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:57,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:57,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:57,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:57,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797437569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:57,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:57,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:43:57,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235069124] [2021-06-05 22:43:57,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:43:57,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:57,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:43:57,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:57,967 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:58,462 INFO L93 Difference]: Finished difference Result 2775 states and 5552 transitions. [2021-06-05 22:43:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:43:58,462 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:43:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:58,465 INFO L225 Difference]: With dead ends: 2775 [2021-06-05 22:43:58,465 INFO L226 Difference]: Without dead ends: 2751 [2021-06-05 22:43:58,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-06-05 22:43:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2114. [2021-06-05 22:43:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-05 22:43:58,489 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-05 22:43:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:58,489 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-05 22:43:58,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-05 22:43:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:58,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:58,491 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:58,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 22:43:58,709 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:58,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1598664591, now seen corresponding path program 102 times [2021-06-05 22:43:58,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:58,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320774649] [2021-06-05 22:43:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:43:58,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:58,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320774649] [2021-06-05 22:43:58,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320774649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:58,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190324409] [2021-06-05 22:43:58,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:58,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:43:58,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:58,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 22:43:58,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:59,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:59,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:59,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:59,481 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 89 treesize of output 37 [2021-06-05 22:43:59,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:59,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:59,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:59,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:43:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190324409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:59,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:59,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 22:43:59,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438117000] [2021-06-05 22:43:59,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:43:59,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:59,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:43:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:59,502 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:59,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:59,913 INFO L93 Difference]: Finished difference Result 3031 states and 6075 transitions. [2021-06-05 22:43:59,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:43:59,914 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:43:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:59,916 INFO L225 Difference]: With dead ends: 3031 [2021-06-05 22:43:59,916 INFO L226 Difference]: Without dead ends: 2851 [2021-06-05 22:43:59,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 715.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-05 22:43:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2204. [2021-06-05 22:43:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9809350885156605) internal successors, (4364), 2203 states have internal predecessors, (4364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:59,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4364 transitions. [2021-06-05 22:43:59,933 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4364 transitions. Word has length 36 [2021-06-05 22:43:59,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:59,934 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4364 transitions. [2021-06-05 22:43:59,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:59,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4364 transitions. [2021-06-05 22:43:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:43:59,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:59,935 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:00,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 22:44:00,136 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash 124692487, now seen corresponding path program 103 times [2021-06-05 22:44:00,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:00,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421355853] [2021-06-05 22:44:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:00,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:00,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421355853] [2021-06-05 22:44:00,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421355853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:00,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278969038] [2021-06-05 22:44:00,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:00,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:00,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:00,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:00,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:00,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:00,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:00,939 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 89 treesize of output 37 [2021-06-05 22:44:00,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:00,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:00,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:00,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:00,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278969038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:00,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:00,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:44:00,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405670135] [2021-06-05 22:44:00,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:00,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:00,957 INFO L87 Difference]: Start difference. First operand 2204 states and 4364 transitions. Second operand has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:44:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:01,334 INFO L93 Difference]: Finished difference Result 3432 states and 6914 transitions. [2021-06-05 22:44:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:44:01,334 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) 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) Word has length 36 [2021-06-05 22:44:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:01,337 INFO L225 Difference]: With dead ends: 3432 [2021-06-05 22:44:01,337 INFO L226 Difference]: Without dead ends: 3379 [2021-06-05 22:44:01,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2021-06-05 22:44:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 2192. [2021-06-05 22:44:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.9808306709265175) internal successors, (4340), 2191 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 4340 transitions. [2021-06-05 22:44:01,363 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 4340 transitions. Word has length 36 [2021-06-05 22:44:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:01,363 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 4340 transitions. [2021-06-05 22:44:01,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:44:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 4340 transitions. [2021-06-05 22:44:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:01,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:01,364 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:01,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:01,565 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1579308017, now seen corresponding path program 104 times [2021-06-05 22:44:01,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:01,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498264938] [2021-06-05 22:44:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:01,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:01,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498264938] [2021-06-05 22:44:01,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498264938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:01,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097603490] [2021-06-05 22:44:01,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:01,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:01,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:01,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:01,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:02,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:02,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:02,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:02,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:02,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:02,345 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 89 treesize of output 37 [2021-06-05 22:44:02,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:02,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:02,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:02,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:02,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097603490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:02,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:02,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:44:02,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252984551] [2021-06-05 22:44:02,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:02,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:02,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:02,363 INFO L87 Difference]: Start difference. First operand 2192 states and 4340 transitions. Second operand has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:44:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:02,926 INFO L93 Difference]: Finished difference Result 3344 states and 6703 transitions. [2021-06-05 22:44:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:44:02,926 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) 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) Word has length 36 [2021-06-05 22:44:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:02,929 INFO L225 Difference]: With dead ends: 3344 [2021-06-05 22:44:02,929 INFO L226 Difference]: Without dead ends: 3283 [2021-06-05 22:44:02,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-06-05 22:44:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2207. [2021-06-05 22:44:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 1.9805077062556664) internal successors, (4369), 2206 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 4369 transitions. [2021-06-05 22:44:02,954 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 4369 transitions. Word has length 36 [2021-06-05 22:44:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:02,954 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 4369 transitions. [2021-06-05 22:44:02,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) 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) [2021-06-05 22:44:02,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 4369 transitions. [2021-06-05 22:44:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:02,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:02,956 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:03,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:03,171 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:03,171 INFO L82 PathProgramCache]: Analyzing trace with hash 157509587, now seen corresponding path program 105 times [2021-06-05 22:44:03,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:03,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91161474] [2021-06-05 22:44:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:03,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:03,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91161474] [2021-06-05 22:44:03,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91161474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:03,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487063298] [2021-06-05 22:44:03,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:03,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:44:03,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:03,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:03,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:03,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:03,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:03,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:03,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:03,950 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 89 treesize of output 37 [2021-06-05 22:44:03,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:03,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:03,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:03,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:03,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487063298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:03,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:03,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:44:03,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834386915] [2021-06-05 22:44:03,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:44:03,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:03,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:44:03,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:03,968 INFO L87 Difference]: Start difference. First operand 2207 states and 4369 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:04,324 INFO L93 Difference]: Finished difference Result 3254 states and 6538 transitions. [2021-06-05 22:44:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:44:04,324 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:44:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:04,327 INFO L225 Difference]: With dead ends: 3254 [2021-06-05 22:44:04,327 INFO L226 Difference]: Without dead ends: 3197 [2021-06-05 22:44:04,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-06-05 22:44:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2195. [2021-06-05 22:44:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.980401093892434) internal successors, (4345), 2194 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4345 transitions. [2021-06-05 22:44:04,346 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4345 transitions. Word has length 36 [2021-06-05 22:44:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:04,346 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 4345 transitions. [2021-06-05 22:44:04,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4345 transitions. [2021-06-05 22:44:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:04,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:04,347 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:04,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:04,561 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1394121653, now seen corresponding path program 106 times [2021-06-05 22:44:04,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:04,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249866373] [2021-06-05 22:44:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:04,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:04,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249866373] [2021-06-05 22:44:04,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249866373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:04,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001185443] [2021-06-05 22:44:04,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:04,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:04,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:04,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:05,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:05,430 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 89 treesize of output 37 [2021-06-05 22:44:05,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:05,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:05,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:05,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:05,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001185443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:05,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:05,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:44:05,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571024489] [2021-06-05 22:44:05,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:44:05,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:05,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:44:05,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:05,458 INFO L87 Difference]: Start difference. First operand 2195 states and 4345 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:06,016 INFO L93 Difference]: Finished difference Result 2867 states and 5731 transitions. [2021-06-05 22:44:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:44:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:44:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:06,019 INFO L225 Difference]: With dead ends: 2867 [2021-06-05 22:44:06,019 INFO L226 Difference]: Without dead ends: 2844 [2021-06-05 22:44:06,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 712.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2021-06-05 22:44:06,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2204. [2021-06-05 22:44:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-06-05 22:44:06,038 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-06-05 22:44:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:06,038 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-06-05 22:44:06,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-06-05 22:44:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:06,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:06,039 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:06,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:06,240 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash -391181515, now seen corresponding path program 107 times [2021-06-05 22:44:06,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:06,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114616611] [2021-06-05 22:44:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:06,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:06,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114616611] [2021-06-05 22:44:06,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114616611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:06,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90653771] [2021-06-05 22:44:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:06,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:44:06,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:06,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:06,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:07,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:07,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:07,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:07,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:07,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:07,043 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 89 treesize of output 37 [2021-06-05 22:44:07,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:07,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:07,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:07,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:07,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90653771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:07,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:07,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:44:07,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507628882] [2021-06-05 22:44:07,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:44:07,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:07,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:44:07,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:07,062 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:07,555 INFO L93 Difference]: Finished difference Result 2878 states and 5754 transitions. [2021-06-05 22:44:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:44:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:44:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:07,558 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 22:44:07,558 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 22:44:07,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 22:44:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2204. [2021-06-05 22:44:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-06-05 22:44:07,577 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-06-05 22:44:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:07,577 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-06-05 22:44:07,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-06-05 22:44:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:07,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:07,578 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:07,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 22:44:07,779 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:07,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1155151443, now seen corresponding path program 108 times [2021-06-05 22:44:07,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:07,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501466898] [2021-06-05 22:44:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:08,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:08,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501466898] [2021-06-05 22:44:08,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501466898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:08,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895956239] [2021-06-05 22:44:08,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:08,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:44:08,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:08,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 22:44:08,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:08,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:08,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:08,766 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 89 treesize of output 37 [2021-06-05 22:44:08,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:08,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:08,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:08,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895956239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:08,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:08,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:44:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610776348] [2021-06-05 22:44:08,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:44:08,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:44:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:08,784 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:09,272 INFO L93 Difference]: Finished difference Result 3075 states and 6179 transitions. [2021-06-05 22:44:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:44:09,273 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 36 [2021-06-05 22:44:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:09,275 INFO L225 Difference]: With dead ends: 3075 [2021-06-05 22:44:09,276 INFO L226 Difference]: Without dead ends: 2931 [2021-06-05 22:44:09,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2021-06-05 22:44:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2247. [2021-06-05 22:44:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.9821905609973285) internal successors, (4452), 2246 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 4452 transitions. [2021-06-05 22:44:09,294 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 4452 transitions. Word has length 36 [2021-06-05 22:44:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:09,294 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 4452 transitions. [2021-06-05 22:44:09,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 4452 transitions. [2021-06-05 22:44:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:09,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:09,296 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:09,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 22:44:09,497 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1735088919, now seen corresponding path program 109 times [2021-06-05 22:44:09,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:09,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276585946] [2021-06-05 22:44:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:09,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276585946] [2021-06-05 22:44:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276585946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607080185] [2021-06-05 22:44:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:09,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:10,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,245 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 89 treesize of output 37 [2021-06-05 22:44:10,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:10,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:10,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:10,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:10,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607080185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:10,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:10,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 22:44:10,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491173928] [2021-06-05 22:44:10,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:10,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:10,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:10,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:10,286 INFO L87 Difference]: Start difference. First operand 2247 states and 4452 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:10,735 INFO L93 Difference]: Finished difference Result 4634 states and 9317 transitions. [2021-06-05 22:44:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:44:10,735 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 36 [2021-06-05 22:44:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:10,739 INFO L225 Difference]: With dead ends: 4634 [2021-06-05 22:44:10,739 INFO L226 Difference]: Without dead ends: 4591 [2021-06-05 22:44:10,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 725.1ms TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:44:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-06-05 22:44:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 2286. [2021-06-05 22:44:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 1.9785557986870896) internal successors, (4521), 2285 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4521 transitions. [2021-06-05 22:44:10,765 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4521 transitions. Word has length 36 [2021-06-05 22:44:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:10,765 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 4521 transitions. [2021-06-05 22:44:10,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4521 transitions. [2021-06-05 22:44:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:10,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:10,767 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:10,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 22:44:10,967 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:10,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1139316895, now seen corresponding path program 110 times [2021-06-05 22:44:10,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:10,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39107603] [2021-06-05 22:44:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:11,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:11,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39107603] [2021-06-05 22:44:11,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39107603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:11,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750411919] [2021-06-05 22:44:11,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:11,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:11,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:11,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 22:44:11,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:11,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:11,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:11,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:11,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:11,704 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 91 treesize of output 37 [2021-06-05 22:44:11,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:11,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:11,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:11,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 22:44:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:11,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750411919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:11,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:11,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:44:11,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930031707] [2021-06-05 22:44:11,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:44:11,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:11,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:44:11,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:11,745 INFO L87 Difference]: Start difference. First operand 2286 states and 4521 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:12,314 INFO L93 Difference]: Finished difference Result 4423 states and 8911 transitions. [2021-06-05 22:44:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 36 [2021-06-05 22:44:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:12,318 INFO L225 Difference]: With dead ends: 4423 [2021-06-05 22:44:12,318 INFO L226 Difference]: Without dead ends: 4375 [2021-06-05 22:44:12,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:44:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2021-06-05 22:44:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 2331. [2021-06-05 22:44:12,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 1.978969957081545) internal successors, (4611), 2330 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4611 transitions. [2021-06-05 22:44:12,343 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4611 transitions. Word has length 36 [2021-06-05 22:44:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:12,343 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 4611 transitions. [2021-06-05 22:44:12,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4611 transitions. [2021-06-05 22:44:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:12,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:12,345 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:12,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:12,561 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1250362455, now seen corresponding path program 111 times [2021-06-05 22:44:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:12,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108047094] [2021-06-05 22:44:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:12,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:12,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108047094] [2021-06-05 22:44:12,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108047094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:12,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073431921] [2021-06-05 22:44:12,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:12,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:44:12,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:12,863 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:12,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:13,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:13,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:13,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:13,324 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 89 treesize of output 37 [2021-06-05 22:44:13,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:13,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:13,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:13,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:13,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073431921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:13,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:13,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:44:13,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594357453] [2021-06-05 22:44:13,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:44:13,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:13,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:44:13,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:13,365 INFO L87 Difference]: Start difference. First operand 2331 states and 4611 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:14,084 INFO L93 Difference]: Finished difference Result 4274 states and 8601 transitions. [2021-06-05 22:44:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:44:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 36 [2021-06-05 22:44:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:14,088 INFO L225 Difference]: With dead ends: 4274 [2021-06-05 22:44:14,088 INFO L226 Difference]: Without dead ends: 4231 [2021-06-05 22:44:14,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 775.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:44:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-05 22:44:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2382. [2021-06-05 22:44:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 1.9794204115917682) internal successors, (4713), 2381 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 4713 transitions. [2021-06-05 22:44:14,112 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 4713 transitions. Word has length 36 [2021-06-05 22:44:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:14,112 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 4713 transitions. [2021-06-05 22:44:14,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 4713 transitions. [2021-06-05 22:44:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:14,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:14,114 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:14,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 22:44:14,316 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:14,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1492973601, now seen corresponding path program 112 times [2021-06-05 22:44:14,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:14,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118636502] [2021-06-05 22:44:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:14,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:14,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118636502] [2021-06-05 22:44:14,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118636502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:14,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245528024] [2021-06-05 22:44:14,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:14,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:14,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:14,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:14,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:15,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:15,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:15,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:15,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:15,074 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 89 treesize of output 37 [2021-06-05 22:44:15,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:15,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:15,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:15,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:15,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245528024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:15,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:15,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 22:44:15,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220804979] [2021-06-05 22:44:15,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 22:44:15,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 22:44:15,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:15,129 INFO L87 Difference]: Start difference. First operand 2382 states and 4713 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:15,851 INFO L93 Difference]: Finished difference Result 4262 states and 8590 transitions. [2021-06-05 22:44:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:44:15,852 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 36 [2021-06-05 22:44:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:15,855 INFO L225 Difference]: With dead ends: 4262 [2021-06-05 22:44:15,856 INFO L226 Difference]: Without dead ends: 4200 [2021-06-05 22:44:15,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 835.5ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:44:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-05 22:44:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 2372. [2021-06-05 22:44:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 1.9801771404470687) internal successors, (4695), 2371 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 4695 transitions. [2021-06-05 22:44:15,880 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 4695 transitions. Word has length 36 [2021-06-05 22:44:15,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:15,880 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 4695 transitions. [2021-06-05 22:44:15,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 4695 transitions. [2021-06-05 22:44:15,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:15,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:15,882 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:16,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:16,082 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:16,083 INFO L82 PathProgramCache]: Analyzing trace with hash 140658571, now seen corresponding path program 113 times [2021-06-05 22:44:16,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:16,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430465353] [2021-06-05 22:44:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:16,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:16,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430465353] [2021-06-05 22:44:16,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430465353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:16,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658565663] [2021-06-05 22:44:16,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:16,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:44:16,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:16,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 22:44:16,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:16,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:16,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:16,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:16,993 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 66 treesize of output 30 [2021-06-05 22:44:16,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:17,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:17,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:17,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 22:44:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:17,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658565663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:17,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:17,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-05 22:44:17,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288533388] [2021-06-05 22:44:17,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 22:44:17,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:17,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 22:44:17,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:44:17,030 INFO L87 Difference]: Start difference. First operand 2372 states and 4695 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:18,613 INFO L93 Difference]: Finished difference Result 3919 states and 7823 transitions. [2021-06-05 22:44:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:44:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 36 [2021-06-05 22:44:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:18,617 INFO L225 Difference]: With dead ends: 3919 [2021-06-05 22:44:18,617 INFO L226 Difference]: Without dead ends: 3722 [2021-06-05 22:44:18,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1437.9ms TimeCoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:44:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-06-05 22:44:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 2432. [2021-06-05 22:44:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 1.9819004524886878) internal successors, (4818), 2431 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 4818 transitions. [2021-06-05 22:44:18,638 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 4818 transitions. Word has length 36 [2021-06-05 22:44:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:18,638 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 4818 transitions. [2021-06-05 22:44:18,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 4818 transitions. [2021-06-05 22:44:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:18,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:18,640 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:18,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 22:44:18,841 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash -768920415, now seen corresponding path program 114 times [2021-06-05 22:44:18,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:18,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009201056] [2021-06-05 22:44:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:19,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:19,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009201056] [2021-06-05 22:44:19,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009201056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:19,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042823125] [2021-06-05 22:44:19,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:19,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:44:19,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:19,134 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 22:44:19,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:19,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:19,631 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 89 treesize of output 37 [2021-06-05 22:44:19,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:19,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:19,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:19,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:19,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042823125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:19,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:19,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 22:44:19,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369630926] [2021-06-05 22:44:19,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:19,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:19,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:19,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:19,649 INFO L87 Difference]: Start difference. First operand 2432 states and 4818 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:20,077 INFO L93 Difference]: Finished difference Result 3994 states and 7991 transitions. [2021-06-05 22:44:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 36 [2021-06-05 22:44:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:20,081 INFO L225 Difference]: With dead ends: 3994 [2021-06-05 22:44:20,081 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 22:44:20,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 656.3ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:20,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 22:44:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2486. [2021-06-05 22:44:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-06-05 22:44:20,115 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-06-05 22:44:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:20,115 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-06-05 22:44:20,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-06-05 22:44:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:20,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:20,116 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:20,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:20,317 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash 234019723, now seen corresponding path program 115 times [2021-06-05 22:44:20,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:20,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735045585] [2021-06-05 22:44:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:20,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:20,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735045585] [2021-06-05 22:44:20,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735045585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:20,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581981610] [2021-06-05 22:44:20,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:20,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:20,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:21,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:21,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:21,099 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 89 treesize of output 37 [2021-06-05 22:44:21,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:21,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:21,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:21,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:21,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581981610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:21,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:21,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 22:44:21,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744321190] [2021-06-05 22:44:21,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:21,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:21,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:21,117 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:21,686 INFO L93 Difference]: Finished difference Result 3663 states and 7313 transitions. [2021-06-05 22:44:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:21,687 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 36 [2021-06-05 22:44:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:21,690 INFO L225 Difference]: With dead ends: 3663 [2021-06-05 22:44:21,690 INFO L226 Difference]: Without dead ends: 3639 [2021-06-05 22:44:21,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-06-05 22:44:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2486. [2021-06-05 22:44:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-06-05 22:44:21,721 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-06-05 22:44:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:21,721 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-06-05 22:44:21,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-06-05 22:44:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:21,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:21,723 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:21,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:21,924 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash 726123041, now seen corresponding path program 116 times [2021-06-05 22:44:21,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:21,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961127301] [2021-06-05 22:44:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:22,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961127301] [2021-06-05 22:44:22,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961127301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827651210] [2021-06-05 22:44:22,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:22,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:22,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:22,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:22,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:22,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:22,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:22,644 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 89 treesize of output 37 [2021-06-05 22:44:22,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:22,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:22,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:22,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827651210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:22,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:22,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2021-06-05 22:44:22,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823466050] [2021-06-05 22:44:22,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:44:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:44:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:44:22,670 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:23,069 INFO L93 Difference]: Finished difference Result 3578 states and 7155 transitions. [2021-06-05 22:44:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:44:23,069 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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 36 [2021-06-05 22:44:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:23,073 INFO L225 Difference]: With dead ends: 3578 [2021-06-05 22:44:23,073 INFO L226 Difference]: Without dead ends: 3364 [2021-06-05 22:44:23,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 668.8ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-06-05 22:44:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 2624. [2021-06-05 22:44:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 1.9797941288600838) internal successors, (5193), 2623 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 5193 transitions. [2021-06-05 22:44:23,095 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 5193 transitions. Word has length 36 [2021-06-05 22:44:23,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:23,095 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 5193 transitions. [2021-06-05 22:44:23,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 5193 transitions. [2021-06-05 22:44:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:23,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:23,097 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:23,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 22:44:23,297 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash 144742215, now seen corresponding path program 117 times [2021-06-05 22:44:23,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:23,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586728291] [2021-06-05 22:44:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:44:23,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:23,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586728291] [2021-06-05 22:44:23,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586728291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:23,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912717671] [2021-06-05 22:44:23,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:23,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:44:23,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:23,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:23,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:23,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:23,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:23,974 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 89 treesize of output 37 [2021-06-05 22:44:23,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:23,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:23,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:23,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:23,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912717671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:23,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:23,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2021-06-05 22:44:23,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664420469] [2021-06-05 22:44:23,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:44:23,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:23,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:44:23,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:44:23,992 INFO L87 Difference]: Start difference. First operand 2624 states and 5193 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 22:44:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:24,482 INFO L93 Difference]: Finished difference Result 3703 states and 7416 transitions. [2021-06-05 22:44:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:44:24,483 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 36 [2021-06-05 22:44:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:24,486 INFO L225 Difference]: With dead ends: 3703 [2021-06-05 22:44:24,486 INFO L226 Difference]: Without dead ends: 3490 [2021-06-05 22:44:24,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-05 22:44:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2501. [2021-06-05 22:44:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-06-05 22:44:24,508 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-06-05 22:44:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:24,508 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-06-05 22:44:24,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 22:44:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-06-05 22:44:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:24,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:24,509 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:24,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 22:44:24,710 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1446923267, now seen corresponding path program 118 times [2021-06-05 22:44:24,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:24,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101900063] [2021-06-05 22:44:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:24,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:24,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101900063] [2021-06-05 22:44:24,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101900063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:24,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611117130] [2021-06-05 22:44:24,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:25,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:25,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:25,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:25,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:25,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:25,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:25,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,476 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 89 treesize of output 37 [2021-06-05 22:44:25,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:25,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:25,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:25,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:25,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611117130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:25,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:25,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 22:44:25,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192848479] [2021-06-05 22:44:25,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:25,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:25,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:25,494 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:26,279 INFO L93 Difference]: Finished difference Result 3628 states and 7297 transitions. [2021-06-05 22:44:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:26,279 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 36 [2021-06-05 22:44:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:26,282 INFO L225 Difference]: With dead ends: 3628 [2021-06-05 22:44:26,282 INFO L226 Difference]: Without dead ends: 3563 [2021-06-05 22:44:26,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-06-05 22:44:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2501. [2021-06-05 22:44:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-06-05 22:44:26,305 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-06-05 22:44:26,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:26,305 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-06-05 22:44:26,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-06-05 22:44:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:26,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:26,307 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:26,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:26,508 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:26,508 INFO L82 PathProgramCache]: Analyzing trace with hash 537344281, now seen corresponding path program 119 times [2021-06-05 22:44:26,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:26,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171779384] [2021-06-05 22:44:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:26,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:26,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171779384] [2021-06-05 22:44:26,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171779384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:26,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563681867] [2021-06-05 22:44:26,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:26,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:44:26,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:26,863 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 22:44:26,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:27,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:27,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:27,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:27,433 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 66 treesize of output 30 [2021-06-05 22:44:27,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:27,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:27,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:27,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 22:44:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:27,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563681867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:27,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:27,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-05 22:44:27,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712303910] [2021-06-05 22:44:27,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 22:44:27,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 22:44:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:44:27,463 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:29,091 INFO L93 Difference]: Finished difference Result 3874 states and 7764 transitions. [2021-06-05 22:44:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:44:29,092 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 36 [2021-06-05 22:44:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:29,095 INFO L225 Difference]: With dead ends: 3874 [2021-06-05 22:44:29,095 INFO L226 Difference]: Without dead ends: 3713 [2021-06-05 22:44:29,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1651.6ms TimeCoverageRelationStatistics Valid=214, Invalid=2648, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:44:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-06-05 22:44:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 2540. [2021-06-05 22:44:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-06-05 22:44:29,118 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-06-05 22:44:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:29,118 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-06-05 22:44:29,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:29,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-06-05 22:44:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:29,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:29,120 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:29,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 22:44:29,320 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:29,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1540284419, now seen corresponding path program 120 times [2021-06-05 22:44:29,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:29,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688379150] [2021-06-05 22:44:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:29,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:29,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688379150] [2021-06-05 22:44:29,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688379150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:29,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728802831] [2021-06-05 22:44:29,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:29,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:44:29,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:29,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:29,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:30,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:30,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:30,088 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 89 treesize of output 37 [2021-06-05 22:44:30,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:30,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:30,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:30,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:30,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728802831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:30,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:30,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 22:44:30,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861739231] [2021-06-05 22:44:30,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:30,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:30,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:30,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:30,106 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:30,747 INFO L93 Difference]: Finished difference Result 3517 states and 7032 transitions. [2021-06-05 22:44:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 36 [2021-06-05 22:44:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:30,750 INFO L225 Difference]: With dead ends: 3517 [2021-06-05 22:44:30,750 INFO L226 Difference]: Without dead ends: 3493 [2021-06-05 22:44:30,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-06-05 22:44:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2540. [2021-06-05 22:44:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-06-05 22:44:30,772 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-06-05 22:44:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:30,772 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-06-05 22:44:30,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-06-05 22:44:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:30,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:30,773 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:30,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:30,974 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1196743521, now seen corresponding path program 121 times [2021-06-05 22:44:30,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:30,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997339411] [2021-06-05 22:44:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:31,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:31,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997339411] [2021-06-05 22:44:31,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997339411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:31,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468151567] [2021-06-05 22:44:31,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:31,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:31,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:31,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:31,738 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 89 treesize of output 37 [2021-06-05 22:44:31,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:31,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:31,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:31,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468151567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:31,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:31,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 22:44:31,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185653734] [2021-06-05 22:44:31,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:31,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:31,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:31,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:31,762 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:32,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:32,227 INFO L93 Difference]: Finished difference Result 3604 states and 7227 transitions. [2021-06-05 22:44:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:32,228 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 36 [2021-06-05 22:44:32,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:32,231 INFO L225 Difference]: With dead ends: 3604 [2021-06-05 22:44:32,231 INFO L226 Difference]: Without dead ends: 3560 [2021-06-05 22:44:32,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 655.9ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-06-05 22:44:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2534. [2021-06-05 22:44:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-06-05 22:44:32,253 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-06-05 22:44:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:32,253 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-06-05 22:44:32,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-06-05 22:44:32,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:32,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:32,255 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:32,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 22:44:32,457 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:32,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2095283637, now seen corresponding path program 122 times [2021-06-05 22:44:32,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:32,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150153538] [2021-06-05 22:44:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:32,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:32,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150153538] [2021-06-05 22:44:32,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150153538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:32,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718310797] [2021-06-05 22:44:32,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:32,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:32,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:32,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:32,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:33,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:33,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:33,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:33,207 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 89 treesize of output 37 [2021-06-05 22:44:33,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:33,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:33,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:33,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:33,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718310797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:33,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:33,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 22:44:33,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998871227] [2021-06-05 22:44:33,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:33,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:33,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:33,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:33,225 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:33,847 INFO L93 Difference]: Finished difference Result 3514 states and 7026 transitions. [2021-06-05 22:44:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 36 [2021-06-05 22:44:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:33,851 INFO L225 Difference]: With dead ends: 3514 [2021-06-05 22:44:33,851 INFO L226 Difference]: Without dead ends: 3490 [2021-06-05 22:44:33,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 630.0ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-05 22:44:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2531. [2021-06-05 22:44:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 1.9837944664031621) internal successors, (5019), 2530 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 5019 transitions. [2021-06-05 22:44:33,875 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 5019 transitions. Word has length 36 [2021-06-05 22:44:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:33,875 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 5019 transitions. [2021-06-05 22:44:33,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 5019 transitions. [2021-06-05 22:44:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:33,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:33,877 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:34,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:34,078 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:34,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1435713731, now seen corresponding path program 123 times [2021-06-05 22:44:34,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:34,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154578430] [2021-06-05 22:44:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:34,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:34,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154578430] [2021-06-05 22:44:34,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154578430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:34,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076938344] [2021-06-05 22:44:34,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:34,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:44:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:34,432 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:34,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:34,984 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 89 treesize of output 37 [2021-06-05 22:44:34,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:34,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:34,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:34,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:35,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076938344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:35,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:35,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 22:44:35,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405255086] [2021-06-05 22:44:35,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:44:35,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:44:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:35,011 INFO L87 Difference]: Start difference. First operand 2531 states and 5019 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:35,734 INFO L93 Difference]: Finished difference Result 3529 states and 7060 transitions. [2021-06-05 22:44:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:35,734 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 36 [2021-06-05 22:44:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:35,737 INFO L225 Difference]: With dead ends: 3529 [2021-06-05 22:44:35,737 INFO L226 Difference]: Without dead ends: 3504 [2021-06-05 22:44:35,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-06-05 22:44:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 2534. [2021-06-05 22:44:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-06-05 22:44:35,760 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-06-05 22:44:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:35,760 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-06-05 22:44:35,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-06-05 22:44:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-06-05 22:44:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:35,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:35,762 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:35,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 22:44:35,962 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:35,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1768497397, now seen corresponding path program 124 times [2021-06-05 22:44:35,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:35,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151727107] [2021-06-05 22:44:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:36,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:36,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151727107] [2021-06-05 22:44:36,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151727107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:36,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626738248] [2021-06-05 22:44:36,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:36,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:36,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:36,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:36,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:36,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:36,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:36,624 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 89 treesize of output 37 [2021-06-05 22:44:36,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:36,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:36,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:36,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:36,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626738248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:36,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:36,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 22:44:36,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888531946] [2021-06-05 22:44:36,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:44:36,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:36,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:44:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:44:36,642 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:37,061 INFO L93 Difference]: Finished difference Result 3439 states and 6862 transitions. [2021-06-05 22:44:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:44:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-05 22:44:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:37,064 INFO L225 Difference]: With dead ends: 3439 [2021-06-05 22:44:37,064 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 22:44:37,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 663.3ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 22:44:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2606. [2021-06-05 22:44:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 1.982341650671785) internal successors, (5164), 2605 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 5164 transitions. [2021-06-05 22:44:37,086 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 5164 transitions. Word has length 36 [2021-06-05 22:44:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:37,086 INFO L482 AbstractCegarLoop]: Abstraction has 2606 states and 5164 transitions. [2021-06-05 22:44:37,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 5164 transitions. [2021-06-05 22:44:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:37,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:37,088 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:37,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 22:44:37,289 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:37,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1516299603, now seen corresponding path program 125 times [2021-06-05 22:44:37,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:37,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067032569] [2021-06-05 22:44:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:37,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:37,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067032569] [2021-06-05 22:44:37,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067032569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:37,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222878392] [2021-06-05 22:44:37,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:37,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:44:37,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:37,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 22:44:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:37,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:37,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:37,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:37,956 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 89 treesize of output 37 [2021-06-05 22:44:37,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:37,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:37,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:37,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:37,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222878392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:37,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:37,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 22:44:37,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265963968] [2021-06-05 22:44:37,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:44:37,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:37,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:44:37,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:44:37,974 INFO L87 Difference]: Start difference. First operand 2606 states and 5164 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:38,639 INFO L93 Difference]: Finished difference Result 3655 states and 7282 transitions. [2021-06-05 22:44:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:44:38,640 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-05 22:44:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:38,643 INFO L225 Difference]: With dead ends: 3655 [2021-06-05 22:44:38,643 INFO L226 Difference]: Without dead ends: 3429 [2021-06-05 22:44:38,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 750.1ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-06-05 22:44:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2750. [2021-06-05 22:44:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.9774463441251364) internal successors, (5436), 2749 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 5436 transitions. [2021-06-05 22:44:38,675 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 5436 transitions. Word has length 36 [2021-06-05 22:44:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:38,675 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 5436 transitions. [2021-06-05 22:44:38,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 5436 transitions. [2021-06-05 22:44:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:38,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:38,678 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:38,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:38,902 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:38,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1945089073, now seen corresponding path program 126 times [2021-06-05 22:44:38,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:38,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022822316] [2021-06-05 22:44:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:39,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:39,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022822316] [2021-06-05 22:44:39,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022822316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:39,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987184795] [2021-06-05 22:44:39,301 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:39,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:44:39,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:39,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:39,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:39,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:39,777 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 89 treesize of output 37 [2021-06-05 22:44:39,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:39,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:39,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:39,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:39,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987184795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:39,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:39,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 22:44:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691277360] [2021-06-05 22:44:39,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:44:39,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:44:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:44:39,795 INFO L87 Difference]: Start difference. First operand 2750 states and 5436 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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) [2021-06-05 22:44:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:40,411 INFO L93 Difference]: Finished difference Result 4517 states and 8999 transitions. [2021-06-05 22:44:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:44:40,411 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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 36 [2021-06-05 22:44:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:40,414 INFO L225 Difference]: With dead ends: 4517 [2021-06-05 22:44:40,414 INFO L226 Difference]: Without dead ends: 4275 [2021-06-05 22:44:40,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 866.1ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:44:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-06-05 22:44:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3137. [2021-06-05 22:44:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 1.9716198979591837) internal successors, (6183), 3136 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 6183 transitions. [2021-06-05 22:44:40,442 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 6183 transitions. Word has length 36 [2021-06-05 22:44:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:40,442 INFO L482 AbstractCegarLoop]: Abstraction has 3137 states and 6183 transitions. [2021-06-05 22:44:40,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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) [2021-06-05 22:44:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 6183 transitions. [2021-06-05 22:44:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:40,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:40,444 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:40,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:40,645 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1047697171, now seen corresponding path program 127 times [2021-06-05 22:44:40,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:40,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55848364] [2021-06-05 22:44:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:40,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:40,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55848364] [2021-06-05 22:44:40,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55848364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:40,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239478993] [2021-06-05 22:44:40,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:40,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:40,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:41,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:41,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:41,411 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 89 treesize of output 37 [2021-06-05 22:44:41,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:41,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:41,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:41,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:41,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239478993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:41,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:41,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 22:44:41,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593590312] [2021-06-05 22:44:41,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:44:41,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:44:41,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:44:41,428 INFO L87 Difference]: Start difference. First operand 3137 states and 6183 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:42,003 INFO L93 Difference]: Finished difference Result 4057 states and 8128 transitions. [2021-06-05 22:44:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:44:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-05 22:44:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:42,006 INFO L225 Difference]: With dead ends: 4057 [2021-06-05 22:44:42,006 INFO L226 Difference]: Without dead ends: 3966 [2021-06-05 22:44:42,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:42,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-06-05 22:44:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3158. [2021-06-05 22:44:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 1.9718086791257523) internal successors, (6225), 3157 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 6225 transitions. [2021-06-05 22:44:42,033 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 6225 transitions. Word has length 36 [2021-06-05 22:44:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:42,033 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 6225 transitions. [2021-06-05 22:44:42,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 6225 transitions. [2021-06-05 22:44:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:42,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:42,035 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:42,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:42,235 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:42,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1035510087, now seen corresponding path program 128 times [2021-06-05 22:44:42,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:42,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448147761] [2021-06-05 22:44:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:42,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:42,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448147761] [2021-06-05 22:44:42,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448147761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:42,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809625008] [2021-06-05 22:44:42,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:42,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:42,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:42,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:42,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:42,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:42,912 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 89 treesize of output 37 [2021-06-05 22:44:42,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:42,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:42,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:42,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:42,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809625008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:42,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:42,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 22:44:42,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888008364] [2021-06-05 22:44:42,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:44:42,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:42,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:44:42,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:44:42,930 INFO L87 Difference]: Start difference. First operand 3158 states and 6225 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:43,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:43,403 INFO L93 Difference]: Finished difference Result 4075 states and 8096 transitions. [2021-06-05 22:44:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:43,403 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-05 22:44:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:43,407 INFO L225 Difference]: With dead ends: 4075 [2021-06-05 22:44:43,407 INFO L226 Difference]: Without dead ends: 3853 [2021-06-05 22:44:43,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 710.0ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2021-06-05 22:44:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3251. [2021-06-05 22:44:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 3250 states have (on average 1.9726153846153847) internal successors, (6411), 3250 states have internal predecessors, (6411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 6411 transitions. [2021-06-05 22:44:43,435 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 6411 transitions. Word has length 36 [2021-06-05 22:44:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:43,435 INFO L482 AbstractCegarLoop]: Abstraction has 3251 states and 6411 transitions. [2021-06-05 22:44:43,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 6411 transitions. [2021-06-05 22:44:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:43,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:43,437 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:43,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:43,637 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:43,637 INFO L82 PathProgramCache]: Analyzing trace with hash -438462017, now seen corresponding path program 129 times [2021-06-05 22:44:43,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:43,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127623039] [2021-06-05 22:44:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:43,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:43,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127623039] [2021-06-05 22:44:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127623039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:43,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55777078] [2021-06-05 22:44:43,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:43,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:44:43,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:43,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:43,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:44,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:44,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:44,396 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 89 treesize of output 37 [2021-06-05 22:44:44,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:44,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:44,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:44,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:44,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55777078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:44,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:44,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 22:44:44,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295850855] [2021-06-05 22:44:44,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:44:44,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:44:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:44:44,414 INFO L87 Difference]: Start difference. First operand 3251 states and 6411 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:44,863 INFO L93 Difference]: Finished difference Result 5265 states and 10504 transitions. [2021-06-05 22:44:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:44:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:44:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:44,867 INFO L225 Difference]: With dead ends: 5265 [2021-06-05 22:44:44,868 INFO L226 Difference]: Without dead ends: 5202 [2021-06-05 22:44:44,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2021-06-05 22:44:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 3164. [2021-06-05 22:44:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 1.971862156180841) internal successors, (6237), 3163 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 6237 transitions. [2021-06-05 22:44:44,901 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 6237 transitions. Word has length 36 [2021-06-05 22:44:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:44,901 INFO L482 AbstractCegarLoop]: Abstraction has 3164 states and 6237 transitions. [2021-06-05 22:44:44,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 6237 transitions. [2021-06-05 22:44:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:44,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:44,903 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:45,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 22:44:45,103 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1957276157, now seen corresponding path program 130 times [2021-06-05 22:44:45,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:45,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87198538] [2021-06-05 22:44:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:45,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:45,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87198538] [2021-06-05 22:44:45,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87198538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:45,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573757810] [2021-06-05 22:44:45,390 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:45,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:45,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:45,414 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:45,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:45,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:45,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:45,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 22:44:45,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:45,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:45,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:45,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:45,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573757810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:45,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:45,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 22:44:45,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193136441] [2021-06-05 22:44:45,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:44:45,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:45,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:44:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:44:45,888 INFO L87 Difference]: Start difference. First operand 3164 states and 6237 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:46,469 INFO L93 Difference]: Finished difference Result 4252 states and 8498 transitions. [2021-06-05 22:44:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:44:46,469 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-05 22:44:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:46,473 INFO L225 Difference]: With dead ends: 4252 [2021-06-05 22:44:46,473 INFO L226 Difference]: Without dead ends: 4193 [2021-06-05 22:44:46,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 631.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-05 22:44:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3191. [2021-06-05 22:44:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-06-05 22:44:46,503 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-06-05 22:44:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:46,503 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-06-05 22:44:46,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-06-05 22:44:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:46,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:46,505 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:46,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 22:44:46,705 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash -954336019, now seen corresponding path program 131 times [2021-06-05 22:44:46,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:46,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814242862] [2021-06-05 22:44:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:47,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:47,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814242862] [2021-06-05 22:44:47,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814242862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:47,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578334061] [2021-06-05 22:44:47,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:47,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:44:47,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:47,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:47,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:47,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:47,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:47,559 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 89 treesize of output 37 [2021-06-05 22:44:47,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:47,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:47,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:47,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:47,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578334061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:47,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:47,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 22:44:47,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070788111] [2021-06-05 22:44:47,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:44:47,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:44:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:44:47,577 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:47,840 INFO L93 Difference]: Finished difference Result 3853 states and 7654 transitions. [2021-06-05 22:44:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:44:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-05 22:44:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:47,843 INFO L225 Difference]: With dead ends: 3853 [2021-06-05 22:44:47,843 INFO L226 Difference]: Without dead ends: 3829 [2021-06-05 22:44:47,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 702.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-06-05 22:44:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3191. [2021-06-05 22:44:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-06-05 22:44:47,873 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-06-05 22:44:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:47,873 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-06-05 22:44:47,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-06-05 22:44:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:47,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:47,875 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:48,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 22:44:48,076 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:48,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1694909327, now seen corresponding path program 132 times [2021-06-05 22:44:48,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:48,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703172624] [2021-06-05 22:44:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:48,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:48,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703172624] [2021-06-05 22:44:48,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703172624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:48,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858666954] [2021-06-05 22:44:48,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:48,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:44:48,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:48,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:48,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:48,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:48,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:48,811 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 89 treesize of output 37 [2021-06-05 22:44:48,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:48,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:48,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:48,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:48,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858666954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:48,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:48,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 22:44:48,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741598727] [2021-06-05 22:44:48,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:44:48,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:48,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:44:48,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:44:48,830 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:49,284 INFO L93 Difference]: Finished difference Result 4117 states and 8186 transitions. [2021-06-05 22:44:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-05 22:44:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:49,288 INFO L225 Difference]: With dead ends: 4117 [2021-06-05 22:44:49,288 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 22:44:49,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 764.9ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 22:44:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3290. [2021-06-05 22:44:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.9723320158102766) internal successors, (6487), 3289 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 6487 transitions. [2021-06-05 22:44:49,316 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 6487 transitions. Word has length 36 [2021-06-05 22:44:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:49,317 INFO L482 AbstractCegarLoop]: Abstraction has 3290 states and 6487 transitions. [2021-06-05 22:44:49,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 6487 transitions. [2021-06-05 22:44:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:49,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:49,319 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:49,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:49,519 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:49,519 INFO L82 PathProgramCache]: Analyzing trace with hash 220937223, now seen corresponding path program 133 times [2021-06-05 22:44:49,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:49,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380727271] [2021-06-05 22:44:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:49,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:49,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380727271] [2021-06-05 22:44:49,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380727271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:49,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780416126] [2021-06-05 22:44:49,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:49,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:50,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:50,255 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 89 treesize of output 37 [2021-06-05 22:44:50,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:50,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:50,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:50,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:50,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780416126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:50,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:50,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 22:44:50,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073606320] [2021-06-05 22:44:50,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:44:50,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:50,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:44:50,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:44:50,272 INFO L87 Difference]: Start difference. First operand 3290 states and 6487 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:50,711 INFO L93 Difference]: Finished difference Result 4583 states and 9168 transitions. [2021-06-05 22:44:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:44:50,711 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:44:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:50,715 INFO L225 Difference]: With dead ends: 4583 [2021-06-05 22:44:50,715 INFO L226 Difference]: Without dead ends: 4530 [2021-06-05 22:44:50,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 627.6ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4530 states. [2021-06-05 22:44:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4530 to 3230. [2021-06-05 22:44:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.9733663672963766) internal successors, (6372), 3229 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 6372 transitions. [2021-06-05 22:44:50,746 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 6372 transitions. Word has length 36 [2021-06-05 22:44:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:50,746 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 6372 transitions. [2021-06-05 22:44:50,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 6372 transitions. [2021-06-05 22:44:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:50,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:50,748 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:50,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 22:44:50,948 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:50,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1675552753, now seen corresponding path program 134 times [2021-06-05 22:44:50,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:50,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438670788] [2021-06-05 22:44:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:51,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:51,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438670788] [2021-06-05 22:44:51,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438670788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:51,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177937063] [2021-06-05 22:44:51,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:51,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:51,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:51,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:51,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:51,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:51,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:51,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:51,653 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 89 treesize of output 37 [2021-06-05 22:44:51,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:51,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:51,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:51,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:51,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177937063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:51,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:51,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 22:44:51,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933330091] [2021-06-05 22:44:51,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:44:51,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:44:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:44:51,674 INFO L87 Difference]: Start difference. First operand 3230 states and 6372 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:52,063 INFO L93 Difference]: Finished difference Result 4673 states and 9315 transitions. [2021-06-05 22:44:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:44:52,064 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:44:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:52,068 INFO L225 Difference]: With dead ends: 4673 [2021-06-05 22:44:52,068 INFO L226 Difference]: Without dead ends: 4610 [2021-06-05 22:44:52,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:44:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-06-05 22:44:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3248. [2021-06-05 22:44:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 1.9728980597474592) internal successors, (6406), 3247 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 6406 transitions. [2021-06-05 22:44:52,099 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 6406 transitions. Word has length 36 [2021-06-05 22:44:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:52,099 INFO L482 AbstractCegarLoop]: Abstraction has 3248 states and 6406 transitions. [2021-06-05 22:44:52,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 6406 transitions. [2021-06-05 22:44:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:52,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:52,101 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:52,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:52,301 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:52,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1297876917, now seen corresponding path program 135 times [2021-06-05 22:44:52,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:52,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097340588] [2021-06-05 22:44:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:52,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:52,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097340588] [2021-06-05 22:44:52,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097340588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:52,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6508808] [2021-06-05 22:44:52,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:52,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:44:52,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:52,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:52,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:53,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:53,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:53,065 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 89 treesize of output 37 [2021-06-05 22:44:53,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:53,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:53,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:53,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:53,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6508808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:53,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:53,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 22:44:53,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657685566] [2021-06-05 22:44:53,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:44:53,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:53,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:44:53,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:44:53,083 INFO L87 Difference]: Start difference. First operand 3248 states and 6406 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:53,568 INFO L93 Difference]: Finished difference Result 4370 states and 8737 transitions. [2021-06-05 22:44:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:44:53,568 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-05 22:44:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:53,572 INFO L225 Difference]: With dead ends: 4370 [2021-06-05 22:44:53,572 INFO L226 Difference]: Without dead ends: 4311 [2021-06-05 22:44:53,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-05 22:44:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3263. [2021-06-05 22:44:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-05 22:44:53,601 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-05 22:44:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:53,601 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-05 22:44:53,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-05 22:44:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:53,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:53,603 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:53,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:53,804 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:53,804 INFO L82 PathProgramCache]: Analyzing trace with hash -294936779, now seen corresponding path program 136 times [2021-06-05 22:44:53,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:53,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953121411] [2021-06-05 22:44:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:54,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:54,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953121411] [2021-06-05 22:44:54,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953121411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:54,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389241596] [2021-06-05 22:44:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:54,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:54,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:54,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:54,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:54,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,526 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 89 treesize of output 37 [2021-06-05 22:44:54,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:54,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:54,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:54,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:54,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389241596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:54,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:54,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 22:44:54,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207786496] [2021-06-05 22:44:54,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:44:54,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:44:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:44:54,544 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:55,029 INFO L93 Difference]: Finished difference Result 3962 states and 7874 transitions. [2021-06-05 22:44:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:44:55,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-05 22:44:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:55,033 INFO L225 Difference]: With dead ends: 3962 [2021-06-05 22:44:55,033 INFO L226 Difference]: Without dead ends: 3938 [2021-06-05 22:44:55,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 614.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:55,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-06-05 22:44:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3263. [2021-06-05 22:44:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-05 22:44:55,069 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-05 22:44:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:55,069 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-05 22:44:55,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-05 22:44:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:55,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:55,071 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:55,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:55,272 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1058906707, now seen corresponding path program 137 times [2021-06-05 22:44:55,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:55,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653384723] [2021-06-05 22:44:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:55,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653384723] [2021-06-05 22:44:55,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653384723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753182897] [2021-06-05 22:44:55,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:55,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:44:55,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:55,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 22:44:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:56,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:56,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:56,013 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 89 treesize of output 37 [2021-06-05 22:44:56,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:56,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:56,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:56,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:56,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753182897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:56,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:56,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 22:44:56,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541676497] [2021-06-05 22:44:56,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:44:56,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:56,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:44:56,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:44:56,030 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:56,427 INFO L93 Difference]: Finished difference Result 3982 states and 7910 transitions. [2021-06-05 22:44:56,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:44:56,427 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-05 22:44:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:56,430 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 22:44:56,430 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 22:44:56,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 613.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:44:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 22:44:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3263. [2021-06-05 22:44:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-05 22:44:56,471 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-05 22:44:56,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:56,471 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-05 22:44:56,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-05 22:44:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:56,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:56,473 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:56,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:56,673 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash -532135131, now seen corresponding path program 138 times [2021-06-05 22:44:56,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:56,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411864932] [2021-06-05 22:44:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:56,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:56,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411864932] [2021-06-05 22:44:56,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411864932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:56,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704265901] [2021-06-05 22:44:56,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:57,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:44:57,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:57,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:57,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:57,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:57,495 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 89 treesize of output 37 [2021-06-05 22:44:57,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:57,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:57,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:57,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:57,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704265901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:57,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:57,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 25 [2021-06-05 22:44:57,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436040769] [2021-06-05 22:44:57,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:44:57,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:57,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:44:57,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:44:57,519 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2021-06-05 22:44:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:57,983 INFO L93 Difference]: Finished difference Result 4128 states and 8203 transitions. [2021-06-05 22:44:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:44:57,984 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 36 [2021-06-05 22:44:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:57,987 INFO L225 Difference]: With dead ends: 4128 [2021-06-05 22:44:57,987 INFO L226 Difference]: Without dead ends: 3903 [2021-06-05 22:44:57,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 875.9ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:44:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2021-06-05 22:44:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 3338. [2021-06-05 22:44:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.9733293377284986) internal successors, (6585), 3337 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 6585 transitions. [2021-06-05 22:44:58,017 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 6585 transitions. Word has length 36 [2021-06-05 22:44:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:58,017 INFO L482 AbstractCegarLoop]: Abstraction has 3338 states and 6585 transitions. [2021-06-05 22:44:58,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2021-06-05 22:44:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 6585 transitions. [2021-06-05 22:44:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:58,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:58,019 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:58,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:58,219 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:58,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2006107235, now seen corresponding path program 139 times [2021-06-05 22:44:58,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:58,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835445756] [2021-06-05 22:44:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:58,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:58,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835445756] [2021-06-05 22:44:58,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835445756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:58,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517325565] [2021-06-05 22:44:58,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:58,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:58,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:58,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:58,936 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 89 treesize of output 37 [2021-06-05 22:44:58,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:58,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:58,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:58,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:44:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:58,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517325565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:58,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:58,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-06-05 22:44:58,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371985422] [2021-06-05 22:44:58,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:44:58,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:58,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:44:58,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:44:58,958 INFO L87 Difference]: Start difference. First operand 3338 states and 6585 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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) [2021-06-05 22:44:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:59,313 INFO L93 Difference]: Finished difference Result 4598 states and 9201 transitions. [2021-06-05 22:44:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:44:59,313 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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 36 [2021-06-05 22:44:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:59,317 INFO L225 Difference]: With dead ends: 4598 [2021-06-05 22:44:59,317 INFO L226 Difference]: Without dead ends: 4545 [2021-06-05 22:44:59,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:44:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-06-05 22:44:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3326. [2021-06-05 22:44:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.973233082706767) internal successors, (6561), 3325 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 6561 transitions. [2021-06-05 22:44:59,348 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 6561 transitions. Word has length 36 [2021-06-05 22:44:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:59,348 INFO L482 AbstractCegarLoop]: Abstraction has 3326 states and 6561 transitions. [2021-06-05 22:44:59,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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) [2021-06-05 22:44:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 6561 transitions. [2021-06-05 22:44:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:44:59,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:59,350 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:59,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 22:44:59,551 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:59,551 INFO L82 PathProgramCache]: Analyzing trace with hash -551491705, now seen corresponding path program 140 times [2021-06-05 22:44:59,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:59,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002316158] [2021-06-05 22:44:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:59,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:59,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002316158] [2021-06-05 22:44:59,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002316158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:59,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917267421] [2021-06-05 22:44:59,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:59,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:59,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:59,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:44:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:00,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:00,341 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 89 treesize of output 37 [2021-06-05 22:45:00,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:00,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:00,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:00,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:45:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:00,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917267421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:00,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:00,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-06-05 22:45:00,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271685213] [2021-06-05 22:45:00,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:45:00,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:00,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:45:00,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:45:00,358 INFO L87 Difference]: Start difference. First operand 3326 states and 6561 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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) [2021-06-05 22:45:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:00,715 INFO L93 Difference]: Finished difference Result 4391 states and 8752 transitions. [2021-06-05 22:45:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:45:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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 36 [2021-06-05 22:45:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:00,719 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 22:45:00,719 INFO L226 Difference]: Without dead ends: 4338 [2021-06-05 22:45:00,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 666.7ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:45:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-05 22:45:00,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3344. [2021-06-05 22:45:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.9736763386180078) internal successors, (6598), 3343 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 6598 transitions. [2021-06-05 22:45:00,749 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 6598 transitions. Word has length 36 [2021-06-05 22:45:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:00,749 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 6598 transitions. [2021-06-05 22:45:00,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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) [2021-06-05 22:45:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 6598 transitions. [2021-06-05 22:45:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:45:00,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:00,751 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:00,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 22:45:00,952 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:00,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:00,952 INFO L82 PathProgramCache]: Analyzing trace with hash 300524031, now seen corresponding path program 141 times [2021-06-05 22:45:00,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:00,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301135837] [2021-06-05 22:45:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:01,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:01,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301135837] [2021-06-05 22:45:01,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301135837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:01,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612524909] [2021-06-05 22:45:01,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:01,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:45:01,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:01,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 22:45:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:01,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:01,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:01,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:01,754 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 87 treesize of output 37 [2021-06-05 22:45:01,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:01,771 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-06-05 22:45:01,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:01,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:10 [2021-06-05 22:45:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:01,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612524909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:01,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:01,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 22:45:01,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920887031] [2021-06-05 22:45:01,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:45:01,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:01,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:45:01,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:45:01,781 INFO L87 Difference]: Start difference. First operand 3344 states and 6598 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:03,004 INFO L93 Difference]: Finished difference Result 4634 states and 9234 transitions. [2021-06-05 22:45:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:45:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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 36 [2021-06-05 22:45:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:03,008 INFO L225 Difference]: With dead ends: 4634 [2021-06-05 22:45:03,008 INFO L226 Difference]: Without dead ends: 4520 [2021-06-05 22:45:03,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1152.9ms TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:45:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2021-06-05 22:45:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3368. [2021-06-05 22:45:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 1.9747549747549749) internal successors, (6649), 3367 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 6649 transitions. [2021-06-05 22:45:03,040 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 6649 transitions. Word has length 36 [2021-06-05 22:45:03,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:03,040 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 6649 transitions. [2021-06-05 22:45:03,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 6649 transitions. [2021-06-05 22:45:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:45:03,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:03,042 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:03,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 22:45:03,244 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 770045921, now seen corresponding path program 142 times [2021-06-05 22:45:03,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:03,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546811727] [2021-06-05 22:45:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:03,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:03,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546811727] [2021-06-05 22:45:03,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546811727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:03,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878872396] [2021-06-05 22:45:03,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:03,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:03,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:03,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:03,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:03,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:03,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:03,966 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 89 treesize of output 37 [2021-06-05 22:45:03,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:03,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:03,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:03,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:45:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:03,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878872396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:03,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:03,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-06-05 22:45:03,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279580964] [2021-06-05 22:45:03,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:45:03,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:03,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:45:03,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:45:03,985 INFO L87 Difference]: Start difference. First operand 3368 states and 6649 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-06-05 22:45:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:04,334 INFO L93 Difference]: Finished difference Result 4433 states and 8859 transitions. [2021-06-05 22:45:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:45:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 36 [2021-06-05 22:45:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:04,338 INFO L225 Difference]: With dead ends: 4433 [2021-06-05 22:45:04,338 INFO L226 Difference]: Without dead ends: 4374 [2021-06-05 22:45:04,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 598.1ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:45:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4374 states. [2021-06-05 22:45:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4374 to 3356. [2021-06-05 22:45:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-06-05 22:45:04,387 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-06-05 22:45:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:04,387 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-06-05 22:45:04,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-06-05 22:45:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-06-05 22:45:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:45:04,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:04,390 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:04,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 22:45:04,609 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1772986059, now seen corresponding path program 143 times [2021-06-05 22:45:04,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:04,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440828169] [2021-06-05 22:45:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:04,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:04,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440828169] [2021-06-05 22:45:04,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440828169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:04,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410026293] [2021-06-05 22:45:04,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:04,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:45:04,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:04,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:04,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:05,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:05,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:05,364 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 89 treesize of output 37 [2021-06-05 22:45:05,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:05,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:05,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:05,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:45:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:05,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410026293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:05,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:05,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-06-05 22:45:05,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562049683] [2021-06-05 22:45:05,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:45:05,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:05,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:45:05,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:45:05,385 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-06-05 22:45:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:05,762 INFO L93 Difference]: Finished difference Result 4113 states and 8183 transitions. [2021-06-05 22:45:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:45:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 36 [2021-06-05 22:45:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:05,765 INFO L225 Difference]: With dead ends: 4113 [2021-06-05 22:45:05,766 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 22:45:05,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:45:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 22:45:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3356. [2021-06-05 22:45:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-06-05 22:45:05,797 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-06-05 22:45:05,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:05,797 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-06-05 22:45:05,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-06-05 22:45:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-06-05 22:45:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:45:05,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:05,799 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:05,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:06,000 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:06,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:06,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1009016131, now seen corresponding path program 144 times [2021-06-05 22:45:06,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:06,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61110585] [2021-06-05 22:45:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:06,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:06,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61110585] [2021-06-05 22:45:06,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61110585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:06,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263669991] [2021-06-05 22:45:06,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:06,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:45:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:06,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:08,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,525 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 83 treesize of output 37 [2021-06-05 22:45:08,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:08,547 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-05 22:45:08,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:08,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-06-05 22:45:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:08,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263669991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:08,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:08,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 22:45:08,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086517932] [2021-06-05 22:45:08,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 22:45:08,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:08,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 22:45:08,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:45:08,561 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:12,190 INFO L93 Difference]: Finished difference Result 4097 states and 8147 transitions. [2021-06-05 22:45:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:45:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 36 [2021-06-05 22:45:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:12,194 INFO L225 Difference]: With dead ends: 4097 [2021-06-05 22:45:12,194 INFO L226 Difference]: Without dead ends: 4063 [2021-06-05 22:45:12,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3302.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:45:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-05 22:45:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3353. [2021-06-05 22:45:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 1.974343675417661) internal successors, (6618), 3352 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 6618 transitions. [2021-06-05 22:45:12,225 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 6618 transitions. Word has length 36 [2021-06-05 22:45:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:12,225 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 6618 transitions. [2021-06-05 22:45:12,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 6618 transitions. [2021-06-05 22:45:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:45:12,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:12,227 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:12,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 22:45:12,427 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:12,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:12,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1533152851, now seen corresponding path program 145 times [2021-06-05 22:45:12,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:12,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572189543] [2021-06-05 22:45:12,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:12,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:12,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572189543] [2021-06-05 22:45:12,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572189543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:12,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466860029] [2021-06-05 22:45:12,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:12,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:13,185 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 22:45:13,185 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 89 treesize of output 37 [2021-06-05 22:45:13,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:13,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:13,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:13,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:10 [2021-06-05 22:45:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:13,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466860029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:13,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:13,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-06-05 22:45:13,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021267703] [2021-06-05 22:45:13,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:45:13,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:13,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:45:13,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:45:13,214 INFO L87 Difference]: Start difference. First operand 3353 states and 6618 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:13,801 INFO L93 Difference]: Finished difference Result 3920 states and 7778 transitions. [2021-06-05 22:45:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:45:13,802 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 36 [2021-06-05 22:45:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:13,805 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 22:45:13,805 INFO L226 Difference]: Without dead ends: 3905 [2021-06-05 22:45:13,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:45:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2021-06-05 22:45:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3360. [2021-06-05 22:45:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 1.9746948496576362) internal successors, (6633), 3359 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 6633 transitions. [2021-06-05 22:45:13,834 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 6633 transitions. Word has length 36 [2021-06-05 22:45:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:13,834 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 6633 transitions. [2021-06-05 22:45:13,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 6633 transitions. [2021-06-05 22:45:13,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 22:45:13,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:13,836 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:14,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:14,037 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:14,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash 297908302, now seen corresponding path program 146 times [2021-06-05 22:45:14,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:14,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449902883] [2021-06-05 22:45:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:14,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:14,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449902883] [2021-06-05 22:45:14,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449902883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:14,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567117602] [2021-06-05 22:45:14,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:14,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:45:14,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:14,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:45:14,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:14,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567117602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:14,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:14,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 22:45:14,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740525568] [2021-06-05 22:45:14,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:45:14,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:45:14,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:45:14,156 INFO L87 Difference]: Start difference. First operand 3360 states and 6633 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:14,189 INFO L93 Difference]: Finished difference Result 3841 states and 7613 transitions. [2021-06-05 22:45:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:45:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 38 [2021-06-05 22:45:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:14,193 INFO L225 Difference]: With dead ends: 3841 [2021-06-05 22:45:14,193 INFO L226 Difference]: Without dead ends: 3830 [2021-06-05 22:45:14,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:45:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-06-05 22:45:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3470. [2021-06-05 22:45:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 1.9824156817526666) internal successors, (6877), 3469 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 6877 transitions. [2021-06-05 22:45:14,227 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 6877 transitions. Word has length 38 [2021-06-05 22:45:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:14,227 INFO L482 AbstractCegarLoop]: Abstraction has 3470 states and 6877 transitions. [2021-06-05 22:45:14,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 6877 transitions. [2021-06-05 22:45:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:45:14,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:14,231 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:14,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:14,439 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:14,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1224230535, now seen corresponding path program 147 times [2021-06-05 22:45:14,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:14,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30105026] [2021-06-05 22:45:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:14,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:14,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30105026] [2021-06-05 22:45:14,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30105026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:14,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211457193] [2021-06-05 22:45:14,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:14,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:45:14,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:14,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:15,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:15,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:15,180 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 89 treesize of output 37 [2021-06-05 22:45:15,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:15,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:15,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:15,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:45:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:15,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211457193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:15,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:15,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 22:45:15,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57739793] [2021-06-05 22:45:15,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:45:15,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:15,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:45:15,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:45:15,198 INFO L87 Difference]: Start difference. First operand 3470 states and 6877 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:15,870 INFO L93 Difference]: Finished difference Result 4514 states and 9036 transitions. [2021-06-05 22:45:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:45:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 39 [2021-06-05 22:45:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:15,875 INFO L225 Difference]: With dead ends: 4514 [2021-06-05 22:45:15,875 INFO L226 Difference]: Without dead ends: 4469 [2021-06-05 22:45:15,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 799.7ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:45:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-05 22:45:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3509. [2021-06-05 22:45:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-06-05 22:45:15,909 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-06-05 22:45:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:15,909 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-06-05 22:45:15,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-06-05 22:45:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:45:15,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:15,911 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:16,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:16,112 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:16,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2076785471, now seen corresponding path program 148 times [2021-06-05 22:45:16,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:16,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057021044] [2021-06-05 22:45:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:16,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:16,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057021044] [2021-06-05 22:45:16,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057021044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:16,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378699735] [2021-06-05 22:45:16,422 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:16,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:16,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:16,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:16,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:16,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:16,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:16,938 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 89 treesize of output 37 [2021-06-05 22:45:16,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:16,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:16,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:16,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:45:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:16,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378699735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:16,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:16,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 22:45:16,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773682754] [2021-06-05 22:45:16,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:45:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:45:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:45:16,958 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:17,458 INFO L93 Difference]: Finished difference Result 4780 states and 9544 transitions. [2021-06-05 22:45:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:45:17,458 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 39 [2021-06-05 22:45:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:17,462 INFO L225 Difference]: With dead ends: 4780 [2021-06-05 22:45:17,462 INFO L226 Difference]: Without dead ends: 4735 [2021-06-05 22:45:17,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 910.1ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:45:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-06-05 22:45:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 3509. [2021-06-05 22:45:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-06-05 22:45:17,497 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-06-05 22:45:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:17,497 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-06-05 22:45:17,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-06-05 22:45:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:45:17,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:17,500 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:17,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:17,700 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:17,701 INFO L82 PathProgramCache]: Analyzing trace with hash 101428265, now seen corresponding path program 149 times [2021-06-05 22:45:17,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:17,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280608824] [2021-06-05 22:45:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:17,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:17,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280608824] [2021-06-05 22:45:17,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280608824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:17,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119449484] [2021-06-05 22:45:17,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:17,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:45:17,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:17,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:18,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:18,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:18,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:18,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:18,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:18,527 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 66 treesize of output 30 [2021-06-05 22:45:18,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:18,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:18,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:18,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 22:45:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:18,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119449484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:18,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:18,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 22:45:18,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941187091] [2021-06-05 22:45:18,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 22:45:18,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:18,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 22:45:18,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:45:18,557 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 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) [2021-06-05 22:45:19,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:19,689 INFO L93 Difference]: Finished difference Result 4916 states and 9863 transitions. [2021-06-05 22:45:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:45:19,689 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 39 [2021-06-05 22:45:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:19,694 INFO L225 Difference]: With dead ends: 4916 [2021-06-05 22:45:19,694 INFO L226 Difference]: Without dead ends: 4871 [2021-06-05 22:45:19,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1201.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:45:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-05 22:45:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3533. [2021-06-05 22:45:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 3532 states have (on average 1.9818799546998866) internal successors, (7000), 3532 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 7000 transitions. [2021-06-05 22:45:19,729 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 7000 transitions. Word has length 39 [2021-06-05 22:45:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:19,729 INFO L482 AbstractCegarLoop]: Abstraction has 3533 states and 7000 transitions. [2021-06-05 22:45:19,729 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) [2021-06-05 22:45:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 7000 transitions. [2021-06-05 22:45:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:45:19,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:19,732 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:19,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:19,933 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1574344523, now seen corresponding path program 150 times [2021-06-05 22:45:19,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:19,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745974219] [2021-06-05 22:45:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:20,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:20,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745974219] [2021-06-05 22:45:20,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745974219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:20,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718304194] [2021-06-05 22:45:20,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:20,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:45:20,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:20,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:20,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:20,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:20,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:20,677 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 89 treesize of output 37 [2021-06-05 22:45:20,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:20,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:20,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:20,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:45:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:20,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718304194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:20,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:20,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 22:45:20,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909619564] [2021-06-05 22:45:20,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:45:20,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:20,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:45:20,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:45:20,695 INFO L87 Difference]: Start difference. First operand 3533 states and 7000 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:21,613 INFO L93 Difference]: Finished difference Result 5103 states and 10179 transitions. [2021-06-05 22:45:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:45:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 [2021-06-05 22:45:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:21,617 INFO L225 Difference]: With dead ends: 5103 [2021-06-05 22:45:21,617 INFO L226 Difference]: Without dead ends: 4891 [2021-06-05 22:45:21,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 902.6ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:45:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-06-05 22:45:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3611. [2021-06-05 22:45:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 1.9817174515235456) internal successors, (7154), 3610 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 7154 transitions. [2021-06-05 22:45:21,652 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 7154 transitions. Word has length 39 [2021-06-05 22:45:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:21,652 INFO L482 AbstractCegarLoop]: Abstraction has 3611 states and 7154 transitions. [2021-06-05 22:45:21,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 7154 transitions. [2021-06-05 22:45:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:45:21,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:21,654 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:21,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 22:45:21,855 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:21,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:21,855 INFO L82 PathProgramCache]: Analyzing trace with hash 935790731, now seen corresponding path program 151 times [2021-06-05 22:45:21,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:21,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589317122] [2021-06-05 22:45:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:22,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:22,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589317122] [2021-06-05 22:45:22,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589317122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:22,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854041718] [2021-06-05 22:45:22,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:22,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:22,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:22,611 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 89 treesize of output 37 [2021-06-05 22:45:22,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:22,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:22,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:22,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:45:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:22,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854041718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:22,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:22,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 22:45:22,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493870874] [2021-06-05 22:45:22,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:45:22,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:45:22,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:45:22,655 INFO L87 Difference]: Start difference. First operand 3611 states and 7154 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:23,621 INFO L93 Difference]: Finished difference Result 4917 states and 9849 transitions. [2021-06-05 22:45:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:45:23,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 [2021-06-05 22:45:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:23,625 INFO L225 Difference]: With dead ends: 4917 [2021-06-05 22:45:23,625 INFO L226 Difference]: Without dead ends: 4872 [2021-06-05 22:45:23,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1016.9ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:45:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-06-05 22:45:23,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3671. [2021-06-05 22:45:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.98283378746594) internal successors, (7277), 3670 states have internal predecessors, (7277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7277 transitions. [2021-06-05 22:45:23,660 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7277 transitions. Word has length 39 [2021-06-05 22:45:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:23,660 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7277 transitions. [2021-06-05 22:45:23,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7277 transitions. [2021-06-05 22:45:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:45:23,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:23,662 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:23,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:23,863 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:23,863 INFO L82 PathProgramCache]: Analyzing trace with hash 616889269, now seen corresponding path program 152 times [2021-06-05 22:45:23,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:23,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529173032] [2021-06-05 22:45:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:24,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:24,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529173032] [2021-06-05 22:45:24,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529173032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:24,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513341046] [2021-06-05 22:45:24,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:24,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:45:24,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:24,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:45:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:24,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:24,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:24,583 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 89 treesize of output 37 [2021-06-05 22:45:24,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:24,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:24,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:24,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 22:45:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513341046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:24,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:24,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 22:45:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104996842] [2021-06-05 22:45:24,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 22:45:24,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:24,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 22:45:24,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:45:24,602 INFO L87 Difference]: Start difference. First operand 3671 states and 7277 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:25,495 INFO L93 Difference]: Finished difference Result 5037 states and 10091 transitions. [2021-06-05 22:45:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:45:25,496 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 [2021-06-05 22:45:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:25,501 INFO L225 Difference]: With dead ends: 5037 [2021-06-05 22:45:25,501 INFO L226 Difference]: Without dead ends: 4992 [2021-06-05 22:45:25,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 889.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:45:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-06-05 22:45:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 3698. [2021-06-05 22:45:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3697 states have (on average 1.9829591560724913) internal successors, (7331), 3697 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 7331 transitions. [2021-06-05 22:45:25,546 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 7331 transitions. Word has length 39 [2021-06-05 22:45:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:25,546 INFO L482 AbstractCegarLoop]: Abstraction has 3698 states and 7331 transitions. [2021-06-05 22:45:25,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 7331 transitions. [2021-06-05 22:45:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:25,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:25,549 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:25,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 22:45:25,749 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:25,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:25,749 INFO L82 PathProgramCache]: Analyzing trace with hash 490317244, now seen corresponding path program 153 times [2021-06-05 22:45:25,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:25,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445670963] [2021-06-05 22:45:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:45:26,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:26,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445670963] [2021-06-05 22:45:26,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445670963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:26,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110814736] [2021-06-05 22:45:26,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:26,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:45:26,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:26,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 22:45:26,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:27,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:27,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:27,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:27,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:27,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:27,195 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 102 treesize of output 44 [2021-06-05 22:45:27,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:27,215 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.9 percent of original size [2021-06-05 22:45:27,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:27,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:123, output treesize:12 [2021-06-05 22:45:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:27,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110814736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:27,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:27,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-06-05 22:45:27,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513346245] [2021-06-05 22:45:27,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:45:27,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:27,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:45:27,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:45:27,228 INFO L87 Difference]: Start difference. First operand 3698 states and 7331 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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) [2021-06-05 22:45:29,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:29,949 INFO L93 Difference]: Finished difference Result 6069 states and 12152 transitions. [2021-06-05 22:45:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:45:29,949 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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 41 [2021-06-05 22:45:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:29,954 INFO L225 Difference]: With dead ends: 6069 [2021-06-05 22:45:29,954 INFO L226 Difference]: Without dead ends: 6002 [2021-06-05 22:45:29,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1301.4ms TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:45:29,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-06-05 22:45:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 3716. [2021-06-05 22:45:29,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-06-05 22:45:30,014 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-06-05 22:45:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:30,014 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-06-05 22:45:30,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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) [2021-06-05 22:45:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-06-05 22:45:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:30,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:30,017 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:30,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 22:45:30,217 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash -543142796, now seen corresponding path program 154 times [2021-06-05 22:45:30,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:30,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972136074] [2021-06-05 22:45:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:30,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:30,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972136074] [2021-06-05 22:45:30,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972136074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:30,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895435825] [2021-06-05 22:45:30,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:30,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:30,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:30,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:45:30,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:31,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:31,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:31,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:31,271 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 108 treesize of output 44 [2021-06-05 22:45:31,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:31,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:31,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:31,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:45:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:31,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895435825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:31,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:31,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 22:45:31,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886730669] [2021-06-05 22:45:31,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:45:31,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:31,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:45:31,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:45:31,289 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-06-05 22:45:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:32,051 INFO L93 Difference]: Finished difference Result 6664 states and 13360 transitions. [2021-06-05 22:45:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:45:32,052 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) Word has length 41 [2021-06-05 22:45:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:32,057 INFO L225 Difference]: With dead ends: 6664 [2021-06-05 22:45:32,057 INFO L226 Difference]: Without dead ends: 6597 [2021-06-05 22:45:32,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 995.6ms TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:45:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2021-06-05 22:45:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 3716. [2021-06-05 22:45:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-06-05 22:45:32,107 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-06-05 22:45:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:32,107 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-06-05 22:45:32,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-06-05 22:45:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-06-05 22:45:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:32,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:32,110 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:32,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 22:45:32,310 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1543593212, now seen corresponding path program 155 times [2021-06-05 22:45:32,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:32,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86587237] [2021-06-05 22:45:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:32,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:32,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86587237] [2021-06-05 22:45:32,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86587237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:32,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598166337] [2021-06-05 22:45:32,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:32,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:45:32,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:32,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:45:32,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:33,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:33,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:33,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:33,566 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 108 treesize of output 44 [2021-06-05 22:45:33,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:33,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:33,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:33,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:45:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:33,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598166337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:33,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:33,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:45:33,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079007816] [2021-06-05 22:45:33,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:45:33,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:33,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:45:33,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:45:33,584 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:34,372 INFO L93 Difference]: Finished difference Result 7025 states and 14072 transitions. [2021-06-05 22:45:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:45:34,372 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:45:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:34,379 INFO L225 Difference]: With dead ends: 7025 [2021-06-05 22:45:34,379 INFO L226 Difference]: Without dead ends: 6922 [2021-06-05 22:45:34,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1207.3ms TimeCoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:45:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2021-06-05 22:45:34,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 3857. [2021-06-05 22:45:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 1.97899377593361) internal successors, (7631), 3856 states have internal predecessors, (7631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 7631 transitions. [2021-06-05 22:45:34,423 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 7631 transitions. Word has length 41 [2021-06-05 22:45:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:34,423 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 7631 transitions. [2021-06-05 22:45:34,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 7631 transitions. [2021-06-05 22:45:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:34,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:34,426 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:34,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:34,636 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:34,636 INFO L82 PathProgramCache]: Analyzing trace with hash -13013580, now seen corresponding path program 156 times [2021-06-05 22:45:34,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:34,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114801857] [2021-06-05 22:45:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:34,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:34,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114801857] [2021-06-05 22:45:34,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114801857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:34,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413745900] [2021-06-05 22:45:34,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:34,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:45:34,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:35,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:45:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:35,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:35,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:35,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:35,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:35,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:35,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:35,766 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 108 treesize of output 44 [2021-06-05 22:45:35,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:35,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:35,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:35,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:45:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:35,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413745900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:35,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:35,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:45:35,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481433126] [2021-06-05 22:45:35,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:45:35,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:35,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:45:35,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:45:35,784 INFO L87 Difference]: Start difference. First operand 3857 states and 7631 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:36,636 INFO L93 Difference]: Finished difference Result 5973 states and 11891 transitions. [2021-06-05 22:45:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:45:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:45:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:36,642 INFO L225 Difference]: With dead ends: 5973 [2021-06-05 22:45:36,642 INFO L226 Difference]: Without dead ends: 5944 [2021-06-05 22:45:36,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1109.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:45:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2021-06-05 22:45:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 3896. [2021-06-05 22:45:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3895 states have (on average 1.9802310654685493) internal successors, (7713), 3895 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 7713 transitions. [2021-06-05 22:45:36,683 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 7713 transitions. Word has length 41 [2021-06-05 22:45:36,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:36,683 INFO L482 AbstractCegarLoop]: Abstraction has 3896 states and 7713 transitions. [2021-06-05 22:45:36,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 7713 transitions. [2021-06-05 22:45:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:36,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:36,686 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:36,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 22:45:36,887 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:36,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:36,888 INFO L82 PathProgramCache]: Analyzing trace with hash -862044258, now seen corresponding path program 157 times [2021-06-05 22:45:36,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:36,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750428771] [2021-06-05 22:45:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:37,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:37,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750428771] [2021-06-05 22:45:37,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750428771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:37,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40800089] [2021-06-05 22:45:37,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:37,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:45:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:37,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:37,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:37,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:38,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:38,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:38,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:38,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:38,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:38,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:38,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:38,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:38,006 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 108 treesize of output 44 [2021-06-05 22:45:38,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:38,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:38,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:38,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:45:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:38,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40800089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:38,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:38,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 22:45:38,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429746165] [2021-06-05 22:45:38,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:45:38,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:38,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:45:38,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:45:38,024 INFO L87 Difference]: Start difference. First operand 3896 states and 7713 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-06-05 22:45:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:38,687 INFO L93 Difference]: Finished difference Result 6364 states and 12786 transitions. [2021-06-05 22:45:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:45:38,688 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) Word has length 41 [2021-06-05 22:45:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:38,694 INFO L225 Difference]: With dead ends: 6364 [2021-06-05 22:45:38,694 INFO L226 Difference]: Without dead ends: 6297 [2021-06-05 22:45:38,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1087.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:45:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6297 states. [2021-06-05 22:45:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6297 to 3182. [2021-06-05 22:45:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 1.994970135177617) internal successors, (6346), 3181 states have internal predecessors, (6346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 6346 transitions. [2021-06-05 22:45:38,733 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 6346 transitions. Word has length 41 [2021-06-05 22:45:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:38,733 INFO L482 AbstractCegarLoop]: Abstraction has 3182 states and 6346 transitions. [2021-06-05 22:45:38,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-06-05 22:45:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 6346 transitions. [2021-06-05 22:45:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:38,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:38,735 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:38,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:38,936 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:38,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1224691750, now seen corresponding path program 158 times [2021-06-05 22:45:38,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:38,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808238152] [2021-06-05 22:45:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:39,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:39,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808238152] [2021-06-05 22:45:39,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808238152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:39,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152102492] [2021-06-05 22:45:39,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:39,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:45:39,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:39,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:45:39,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:40,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:40,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:40,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:40,127 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 108 treesize of output 44 [2021-06-05 22:45:40,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:40,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:40,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:40,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:45:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:40,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152102492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:40,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:40,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:45:40,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945711202] [2021-06-05 22:45:40,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:45:40,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:40,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:45:40,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:45:40,146 INFO L87 Difference]: Start difference. First operand 3182 states and 6346 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:41,199 INFO L93 Difference]: Finished difference Result 5735 states and 11591 transitions. [2021-06-05 22:45:41,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:45:41,199 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:45:41,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:41,206 INFO L225 Difference]: With dead ends: 5735 [2021-06-05 22:45:41,206 INFO L226 Difference]: Without dead ends: 5632 [2021-06-05 22:45:41,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1170.6ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:45:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5632 states. [2021-06-05 22:45:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5632 to 2936. [2021-06-05 22:45:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 2.005792163543441) internal successors, (5887), 2935 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 5887 transitions. [2021-06-05 22:45:41,246 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 5887 transitions. Word has length 41 [2021-06-05 22:45:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:41,246 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 5887 transitions. [2021-06-05 22:45:41,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 5887 transitions. [2021-06-05 22:45:41,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:41,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:41,248 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:41,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:41,449 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:41,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash -331915042, now seen corresponding path program 159 times [2021-06-05 22:45:41,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:41,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146540248] [2021-06-05 22:45:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:41,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146540248] [2021-06-05 22:45:41,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146540248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709857701] [2021-06-05 22:45:41,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:41,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:45:41,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:41,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-05 22:45:41,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:42,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:42,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:42,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:42,723 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 106 treesize of output 44 [2021-06-05 22:45:42,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:42,739 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 22:45:42,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:42,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:126, output treesize:12 [2021-06-05 22:45:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:42,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709857701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:42,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:42,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:45:42,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718581611] [2021-06-05 22:45:42,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:45:42,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:45:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:45:42,750 INFO L87 Difference]: Start difference. First operand 2936 states and 5887 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:45,310 INFO L93 Difference]: Finished difference Result 5251 states and 10563 transitions. [2021-06-05 22:45:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:45:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:45:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:45,314 INFO L225 Difference]: With dead ends: 5251 [2021-06-05 22:45:45,315 INFO L226 Difference]: Without dead ends: 5054 [2021-06-05 22:45:45,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2286.8ms TimeCoverageRelationStatistics Valid=269, Invalid=3763, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:45:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-06-05 22:45:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 3113. [2021-06-05 22:45:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 1.9983933161953729) internal successors, (6219), 3112 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 6219 transitions. [2021-06-05 22:45:45,346 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 6219 transitions. Word has length 41 [2021-06-05 22:45:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:45,346 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 6219 transitions. [2021-06-05 22:45:45,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 6219 transitions. [2021-06-05 22:45:45,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:45,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:45,348 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:45,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:45,549 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash 199723986, now seen corresponding path program 160 times [2021-06-05 22:45:45,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:45,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748834574] [2021-06-05 22:45:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:45,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:45,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748834574] [2021-06-05 22:45:45,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748834574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:45,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963291870] [2021-06-05 22:45:45,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:45,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:45,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:45,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:45:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:46,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:46,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:46,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:46,588 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 108 treesize of output 44 [2021-06-05 22:45:46,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:46,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:46,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:46,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:45:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:46,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963291870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:46,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:46,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 22:45:46,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587300617] [2021-06-05 22:45:46,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:45:46,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:46,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:45:46,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:45:46,620 INFO L87 Difference]: Start difference. First operand 3113 states and 6219 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-06-05 22:45:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:47,394 INFO L93 Difference]: Finished difference Result 5901 states and 11893 transitions. [2021-06-05 22:45:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:45:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) Word has length 41 [2021-06-05 22:45:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:47,398 INFO L225 Difference]: With dead ends: 5901 [2021-06-05 22:45:47,399 INFO L226 Difference]: Without dead ends: 5804 [2021-06-05 22:45:47,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:45:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-06-05 22:45:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 3365. [2021-06-05 22:45:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 1.9913793103448276) internal successors, (6699), 3364 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 6699 transitions. [2021-06-05 22:45:47,435 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 6699 transitions. Word has length 41 [2021-06-05 22:45:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:47,435 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 6699 transitions. [2021-06-05 22:45:47,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-06-05 22:45:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 6699 transitions. [2021-06-05 22:45:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:47,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:47,437 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:47,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:47,638 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:47,638 INFO L82 PathProgramCache]: Analyzing trace with hash -273135364, now seen corresponding path program 161 times [2021-06-05 22:45:47,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:47,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090841430] [2021-06-05 22:45:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:47,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:47,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090841430] [2021-06-05 22:45:47,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090841430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:47,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103373745] [2021-06-05 22:45:47,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:48,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:45:48,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:48,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:45:48,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:50,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:50,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:50,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:50,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:50,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:50,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:50,632 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 36 [2021-06-05 22:45:50,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:50,653 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 22:45:50,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:50,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:99, output treesize:9 [2021-06-05 22:45:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:50,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103373745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:50,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:50,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-05 22:45:50,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513918603] [2021-06-05 22:45:50,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 22:45:50,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:50,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 22:45:50,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:45:50,679 INFO L87 Difference]: Start difference. First operand 3365 states and 6699 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:55,789 INFO L93 Difference]: Finished difference Result 6066 states and 12161 transitions. [2021-06-05 22:45:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:45:55,789 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:45:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:55,794 INFO L225 Difference]: With dead ends: 6066 [2021-06-05 22:45:55,794 INFO L226 Difference]: Without dead ends: 5834 [2021-06-05 22:45:55,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 3768.9ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:45:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-06-05 22:45:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 3467. [2021-06-05 22:45:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-06-05 22:45:55,831 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-06-05 22:45:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:55,831 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-06-05 22:45:55,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:55,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-06-05 22:45:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:55,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:55,834 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:56,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 22:45:56,034 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1829742156, now seen corresponding path program 162 times [2021-06-05 22:45:56,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:56,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756670500] [2021-06-05 22:45:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:56,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756670500] [2021-06-05 22:45:56,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756670500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266992903] [2021-06-05 22:45:56,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:56,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:45:56,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:56,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:45:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:57,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:57,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:57,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:57,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:57,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:57,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:57,318 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 108 treesize of output 44 [2021-06-05 22:45:57,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:57,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:57,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:57,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:45:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:57,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266992903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:57,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:57,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:45:57,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275895541] [2021-06-05 22:45:57,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:45:57,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:57,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:45:57,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:45:57,336 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:58,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:58,522 INFO L93 Difference]: Finished difference Result 5352 states and 10712 transitions. [2021-06-05 22:45:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:45:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:45:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:58,527 INFO L225 Difference]: With dead ends: 5352 [2021-06-05 22:45:58,527 INFO L226 Difference]: Without dead ends: 5323 [2021-06-05 22:45:58,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1242.5ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:45:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2021-06-05 22:45:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 3467. [2021-06-05 22:45:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-06-05 22:45:58,560 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-06-05 22:45:58,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:58,560 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-06-05 22:45:58,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:45:58,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-06-05 22:45:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:58,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:58,563 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:58,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 22:45:58,763 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:58,764 INFO L82 PathProgramCache]: Analyzing trace with hash -981044130, now seen corresponding path program 163 times [2021-06-05 22:45:58,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:58,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165930655] [2021-06-05 22:45:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:59,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:59,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165930655] [2021-06-05 22:45:59,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165930655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:59,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945858465] [2021-06-05 22:45:59,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:59,126 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:45:59,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:59,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:59,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:59,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:45:59,860 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 108 treesize of output 44 [2021-06-05 22:45:59,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:59,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:59,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:59,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:45:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:59,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945858465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:59,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:59,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:45:59,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050421229] [2021-06-05 22:45:59,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:45:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:59,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:45:59,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:45:59,878 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:00,806 INFO L93 Difference]: Finished difference Result 5320 states and 10648 transitions. [2021-06-05 22:46:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:46:00,806 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:46:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:00,810 INFO L225 Difference]: With dead ends: 5320 [2021-06-05 22:46:00,811 INFO L226 Difference]: Without dead ends: 5289 [2021-06-05 22:46:00,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1094.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:46:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2021-06-05 22:46:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 3506. [2021-06-05 22:46:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.9905848787446505) internal successors, (6977), 3505 states have internal predecessors, (6977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 6977 transitions. [2021-06-05 22:46:00,845 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 6977 transitions. Word has length 41 [2021-06-05 22:46:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:00,846 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 6977 transitions. [2021-06-05 22:46:00,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 6977 transitions. [2021-06-05 22:46:00,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:00,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:00,848 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:01,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:01,053 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:01,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1879697322, now seen corresponding path program 164 times [2021-06-05 22:46:01,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:01,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331380294] [2021-06-05 22:46:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:01,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:01,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331380294] [2021-06-05 22:46:01,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331380294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:01,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183895468] [2021-06-05 22:46:01,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:01,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:46:01,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:01,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:46:01,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:02,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:02,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:02,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:02,075 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 108 treesize of output 44 [2021-06-05 22:46:02,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:02,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:02,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:02,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:46:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:02,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183895468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:02,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:02,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 22:46:02,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007814223] [2021-06-05 22:46:02,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:46:02,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:02,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:46:02,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:46:02,093 INFO L87 Difference]: Start difference. First operand 3506 states and 6977 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-06-05 22:46:03,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:03,039 INFO L93 Difference]: Finished difference Result 6035 states and 12259 transitions. [2021-06-05 22:46:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:46:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) Word has length 41 [2021-06-05 22:46:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:03,044 INFO L225 Difference]: With dead ends: 6035 [2021-06-05 22:46:03,044 INFO L226 Difference]: Without dead ends: 5929 [2021-06-05 22:46:03,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:46:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5929 states. [2021-06-05 22:46:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5929 to 3122. [2021-06-05 22:46:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 1.993912207625761) internal successors, (6223), 3121 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 6223 transitions. [2021-06-05 22:46:03,079 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 6223 transitions. Word has length 41 [2021-06-05 22:46:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:03,079 INFO L482 AbstractCegarLoop]: Abstraction has 3122 states and 6223 transitions. [2021-06-05 22:46:03,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-06-05 22:46:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 6223 transitions. [2021-06-05 22:46:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:03,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:03,081 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:03,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 22:46:03,282 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash 207038686, now seen corresponding path program 165 times [2021-06-05 22:46:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:03,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713707903] [2021-06-05 22:46:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:03,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713707903] [2021-06-05 22:46:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713707903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476527112] [2021-06-05 22:46:03,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:03,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:46:03,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:03,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:46:03,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:04,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:04,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:04,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:04,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:04,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:04,372 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 108 treesize of output 44 [2021-06-05 22:46:04,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:04,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:04,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:04,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:46:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:04,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476527112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:04,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:04,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:46:04,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415314695] [2021-06-05 22:46:04,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:46:04,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:46:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:46:04,390 INFO L87 Difference]: Start difference. First operand 3122 states and 6223 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:05,154 INFO L93 Difference]: Finished difference Result 5436 states and 11008 transitions. [2021-06-05 22:46:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:46:05,154 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:46:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:05,159 INFO L225 Difference]: With dead ends: 5436 [2021-06-05 22:46:05,159 INFO L226 Difference]: Without dead ends: 5333 [2021-06-05 22:46:05,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1125.5ms TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:46:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5333 states. [2021-06-05 22:46:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5333 to 2879. [2021-06-05 22:46:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-06-05 22:46:05,189 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-06-05 22:46:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:05,189 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-06-05 22:46:05,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-06-05 22:46:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:05,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:05,191 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:05,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:05,392 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1349568106, now seen corresponding path program 166 times [2021-06-05 22:46:05,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:05,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300811877] [2021-06-05 22:46:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:05,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300811877] [2021-06-05 22:46:05,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300811877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:05,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896940347] [2021-06-05 22:46:05,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:05,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:46:05,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:05,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:46:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:06,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:06,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:06,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:06,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:06,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:06,576 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 108 treesize of output 44 [2021-06-05 22:46:06,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:06,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:06,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:06,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:46:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:06,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896940347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:06,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:06,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:46:06,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847751591] [2021-06-05 22:46:06,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:46:06,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:06,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:46:06,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:46:06,594 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:07,578 INFO L93 Difference]: Finished difference Result 4690 states and 9451 transitions. [2021-06-05 22:46:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:46:07,578 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:46:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:07,582 INFO L225 Difference]: With dead ends: 4690 [2021-06-05 22:46:07,582 INFO L226 Difference]: Without dead ends: 4661 [2021-06-05 22:46:07,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1231.4ms TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:46:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-05 22:46:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 2879. [2021-06-05 22:46:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-06-05 22:46:07,613 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-06-05 22:46:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:07,613 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-06-05 22:46:07,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-06-05 22:46:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:07,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:07,615 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:07,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 22:46:07,816 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:07,816 INFO L82 PathProgramCache]: Analyzing trace with hash 301499944, now seen corresponding path program 167 times [2021-06-05 22:46:07,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:07,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117230781] [2021-06-05 22:46:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:08,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:08,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117230781] [2021-06-05 22:46:08,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117230781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:08,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257749055] [2021-06-05 22:46:08,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:08,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:46:08,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:08,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:46:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:08,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:08,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:08,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:08,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:08,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:08,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:08,987 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 36 [2021-06-05 22:46:08,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:09,001 INFO L628 ElimStorePlain]: treesize reduction 5, result has 82.8 percent of original size [2021-06-05 22:46:09,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:09,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:98, output treesize:9 [2021-06-05 22:46:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:09,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257749055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:09,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:09,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2021-06-05 22:46:09,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747821877] [2021-06-05 22:46:09,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:46:09,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:09,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:46:09,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:46:09,026 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:10,141 INFO L93 Difference]: Finished difference Result 5671 states and 11398 transitions. [2021-06-05 22:46:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:46:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:46:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:10,146 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 22:46:10,146 INFO L226 Difference]: Without dead ends: 5413 [2021-06-05 22:46:10,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1286.2ms TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:46:10,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-05 22:46:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 3262. [2021-06-05 22:46:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 1.9908003679852806) internal successors, (6492), 3261 states have internal predecessors, (6492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 6492 transitions. [2021-06-05 22:46:10,191 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 6492 transitions. Word has length 41 [2021-06-05 22:46:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:10,191 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 6492 transitions. [2021-06-05 22:46:10,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 6492 transitions. [2021-06-05 22:46:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:10,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:10,193 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:10,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:10,393 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:10,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:10,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1290788428, now seen corresponding path program 168 times [2021-06-05 22:46:10,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:10,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465342614] [2021-06-05 22:46:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:10,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:10,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465342614] [2021-06-05 22:46:10,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465342614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:10,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975070851] [2021-06-05 22:46:10,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:10,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:46:10,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:10,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:46:10,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:11,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:11,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:11,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:11,600 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 108 treesize of output 44 [2021-06-05 22:46:11,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:11,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:11,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:11,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:46:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:11,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975070851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:11,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:11,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:46:11,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623200584] [2021-06-05 22:46:11,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:46:11,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:11,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:46:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:46:11,619 INFO L87 Difference]: Start difference. First operand 3262 states and 6492 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:12,265 INFO L93 Difference]: Finished difference Result 6007 states and 12122 transitions. [2021-06-05 22:46:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:46:12,265 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:46:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:12,269 INFO L225 Difference]: With dead ends: 6007 [2021-06-05 22:46:12,269 INFO L226 Difference]: Without dead ends: 5784 [2021-06-05 22:46:12,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1236.4ms TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:46:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5784 states. [2021-06-05 22:46:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5784 to 2866. [2021-06-05 22:46:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 1.9720767888307156) internal successors, (5650), 2865 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 5650 transitions. [2021-06-05 22:46:12,298 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 5650 transitions. Word has length 41 [2021-06-05 22:46:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:12,299 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 5650 transitions. [2021-06-05 22:46:12,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 5650 transitions. [2021-06-05 22:46:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:12,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:12,301 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:12,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:12,501 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1447572076, now seen corresponding path program 169 times [2021-06-05 22:46:12,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:12,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192071018] [2021-06-05 22:46:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:12,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:12,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192071018] [2021-06-05 22:46:12,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192071018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:12,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966246307] [2021-06-05 22:46:12,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:12,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:46:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:13,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:13,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:13,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:13,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:13,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:13,619 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 108 treesize of output 44 [2021-06-05 22:46:13,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:13,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:13,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:13,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:46:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:13,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966246307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:13,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:13,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:46:13,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604889076] [2021-06-05 22:46:13,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:46:13,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:46:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:46:13,637 INFO L87 Difference]: Start difference. First operand 2866 states and 5650 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:14,397 INFO L93 Difference]: Finished difference Result 4555 states and 9072 transitions. [2021-06-05 22:46:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:46:14,397 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:46:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:14,401 INFO L225 Difference]: With dead ends: 4555 [2021-06-05 22:46:14,401 INFO L226 Difference]: Without dead ends: 4532 [2021-06-05 22:46:14,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1113.8ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:46:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-06-05 22:46:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 2872. [2021-06-05 22:46:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-06-05 22:46:14,428 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-06-05 22:46:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:14,428 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-06-05 22:46:14,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-06-05 22:46:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:14,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:14,430 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:14,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:14,631 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:14,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1998697194, now seen corresponding path program 170 times [2021-06-05 22:46:14,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:14,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081606890] [2021-06-05 22:46:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:14,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:14,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081606890] [2021-06-05 22:46:14,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081606890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:14,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724749207] [2021-06-05 22:46:14,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:15,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:46:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:15,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 22:46:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:15,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:15,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:15,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:15,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:15,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:15,736 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 108 treesize of output 44 [2021-06-05 22:46:15,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:15,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:15,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:15,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 22:46:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:15,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724749207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:15,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:15,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 22:46:15,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044915649] [2021-06-05 22:46:15,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:46:15,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:15,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:46:15,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:46:15,754 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:16,543 INFO L93 Difference]: Finished difference Result 4567 states and 9099 transitions. [2021-06-05 22:46:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:46:16,544 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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 41 [2021-06-05 22:46:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:16,547 INFO L225 Difference]: With dead ends: 4567 [2021-06-05 22:46:16,547 INFO L226 Difference]: Without dead ends: 4543 [2021-06-05 22:46:16,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1103.0ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:46:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-06-05 22:46:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 2872. [2021-06-05 22:46:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-06-05 22:46:16,574 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-06-05 22:46:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:16,574 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-06-05 22:46:16,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-06-05 22:46:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-06-05 22:46:16,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:16,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:16,576 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:16,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:16,776 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:16,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1053452280, now seen corresponding path program 171 times [2021-06-05 22:46:16,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:16,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788836390] [2021-06-05 22:46:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:46:17,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:17,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788836390] [2021-06-05 22:46:17,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788836390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:17,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673912709] [2021-06-05 22:46:17,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:17,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:46:17,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:17,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 22:46:17,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:17,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:47:17,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:47:17,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:47:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:47:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:47:17,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:47:17,537 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 96 treesize of output 44 [2021-06-05 22:47:17,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:47:17,565 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:47:17,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:47:17,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:12 [2021-06-05 22:47:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:17,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673912709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:17,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:17,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-06-05 22:47:17,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094694947] [2021-06-05 22:47:17,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:47:17,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:17,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:47:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1072, Unknown=20, NotChecked=0, Total=1190 [2021-06-05 22:47:17,577 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-06-05 22:49:25,927 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-05 22:49:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:49:26,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:26,128 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:893) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:807) 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:364) 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 [2021-06-05 22:49:26,133 INFO L168 Benchmark]: Toolchain (without parser) took 463821.22 ms. Allocated memory was 360.7 MB in the beginning and 752.9 MB in the end (delta: 392.2 MB). Free memory was 339.8 MB in the beginning and 328.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 405.2 MB. Max. memory is 16.0 GB. [2021-06-05 22:49:26,133 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 360.7 MB. Free memory was 341.0 MB in the beginning and 340.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:49:26,133 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.98 ms. Allocated memory is still 360.7 MB. Free memory was 339.7 MB in the beginning and 338.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:49:26,133 INFO L168 Benchmark]: Boogie Preprocessor took 16.06 ms. Allocated memory is still 360.7 MB. Free memory was 338.3 MB in the beginning and 337.3 MB in the end (delta: 970.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:49:26,133 INFO L168 Benchmark]: RCFGBuilder took 313.44 ms. Allocated memory is still 360.7 MB. Free memory was 337.3 MB in the beginning and 325.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 22:49:26,133 INFO L168 Benchmark]: TraceAbstraction took 463461.11 ms. Allocated memory was 360.7 MB in the beginning and 752.9 MB in the end (delta: 392.2 MB). Free memory was 324.6 MB in the beginning and 328.3 MB in the end (delta: -3.7 MB). Peak memory consumption was 390.6 MB. Max. memory is 16.0 GB. [2021-06-05 22:49:26,134 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 360.7 MB. Free memory was 341.0 MB in the beginning and 340.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.98 ms. Allocated memory is still 360.7 MB. Free memory was 339.7 MB in the beginning and 338.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.06 ms. Allocated memory is still 360.7 MB. Free memory was 338.3 MB in the beginning and 337.3 MB in the end (delta: 970.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 313.44 ms. Allocated memory is still 360.7 MB. Free memory was 337.3 MB in the beginning and 325.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 463461.11 ms. Allocated memory was 360.7 MB in the beginning and 752.9 MB in the end (delta: 392.2 MB). Free memory was 324.6 MB in the beginning and 328.3 MB in the end (delta: -3.7 MB). Peak memory consumption was 390.6 MB. Max. memory is 16.0 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...