/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:29:55,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:29:55,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:29:55,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:29:55,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:29:55,503 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:29:55,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:29:55,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:29:55,504 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:29:55,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:29:55,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:29:55,505 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:29:55,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:29:55,505 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:29:55,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:29:55,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:29:55,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:29:55,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:29:55,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:29:55,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:29:55,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:29:55,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:29:55,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:29:55,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:29:55,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:29:55,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:29:55,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:29:55,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:29:55,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:29:55,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:29:55,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:29:55,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:29:55,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:29:55,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:29:55,507 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:29:55,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:29:55,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:29:55,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:29:55,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:29:55,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:29:55,847 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:29:55,849 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:29:55,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl [2021-07-13 20:29:55,850 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl' [2021-07-13 20:29:55,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:29:55,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:29:55,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:29:55,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:29:55,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:29:55,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... [2021-07-13 20:29:55,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... [2021-07-13 20:29:55,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:29:55,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:29:55,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:29:55,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:29:55,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... [2021-07-13 20:29:55,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... [2021-07-13 20:29:55,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... [2021-07-13 20:29:55,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... [2021-07-13 20:29:55,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... [2021-07-13 20:29:55,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... [2021-07-13 20:29:55,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... [2021-07-13 20:29:55,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:29:55,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:29:55,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:29:55,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:29:55,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:29:55,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:29:55,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:29:55,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:29:55,982 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:29:55,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:29:55,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:29:55,983 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:29:55,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:29:55,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:29:55,983 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:29:55,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:29:55,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:29:55,984 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:29:56,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:29:56,167 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:29:56,169 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:29:56 BoogieIcfgContainer [2021-07-13 20:29:56,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:29:56,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:29:56,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:29:56,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:29:56,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:29:55" (1/2) ... [2021-07-13 20:29:56,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7769fb10 and model type max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:29:56, skipping insertion in model container [2021-07-13 20:29:56,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:29:56" (2/2) ... [2021-07-13 20:29:56,174 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array-hom.wvr.bpl [2021-07-13 20:29:56,178 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:29:56,178 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:29:56,178 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:29:56,179 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:29:56,246 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:29:56,261 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:29:56,274 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:29:56,274 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:29:56,274 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:29:56,275 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:29:56,275 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:29:56,275 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:29:56,275 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:29:56,275 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:29:56,282 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-13 20:29:56,303 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:29:56,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:56,313 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:56,313 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash -234684100, now seen corresponding path program 1 times [2021-07-13 20:29:56,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:56,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627185784] [2021-07-13 20:29:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:56,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:56,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627185784] [2021-07-13 20:29:56,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627185784] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:29:56,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:29:56,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:29:56,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435125167] [2021-07-13 20:29:56,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:29:56,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:56,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:29:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:29:56,483 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:56,529 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-13 20:29:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:29:56,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:29:56,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:56,544 INFO L225 Difference]: With dead ends: 217 [2021-07-13 20:29:56,544 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 20:29:56,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:29:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 20:29:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-13 20:29:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-13 20:29:56,609 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-13 20:29:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:56,610 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-13 20:29:56,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,610 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-13 20:29:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:29:56,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:56,611 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:56,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:29:56,612 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:56,612 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-07-13 20:29:56,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:56,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397225060] [2021-07-13 20:29:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:29:56,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:56,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397225060] [2021-07-13 20:29:56,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397225060] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:29:56,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:29:56,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:29:56,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686757643] [2021-07-13 20:29:56,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:29:56,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:56,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:29:56,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:29:56,688 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:56,720 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-13 20:29:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:29:56,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:29:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:56,722 INFO L225 Difference]: With dead ends: 158 [2021-07-13 20:29:56,722 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 20:29:56,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:29:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 20:29:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-13 20:29:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-13 20:29:56,728 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-13 20:29:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:56,728 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-13 20:29:56,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-13 20:29:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:29:56,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:56,730 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:56,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:29:56,730 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1176026010, now seen corresponding path program 1 times [2021-07-13 20:29:56,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:56,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889607157] [2021-07-13 20:29:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:29:56,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:56,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889607157] [2021-07-13 20:29:56,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889607157] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:29:56,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:29:56,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:29:56,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980831677] [2021-07-13 20:29:56,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:29:56,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:29:56,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:29:56,761 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:56,789 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-13 20:29:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:29:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:29:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:56,790 INFO L225 Difference]: With dead ends: 183 [2021-07-13 20:29:56,790 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 20:29:56,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:29:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 20:29:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-13 20:29:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-13 20:29:56,797 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-13 20:29:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:56,797 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-13 20:29:56,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-13 20:29:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:29:56,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:56,798 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:56,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:29:56,798 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:56,799 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-07-13 20:29:56,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:56,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150344585] [2021-07-13 20:29:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:57,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:57,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150344585] [2021-07-13 20:29:57,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150344585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:57,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549282310] [2021-07-13 20:29:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:29:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:57,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:29:57,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:57,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:29:57,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:57,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:29:57,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:57,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:57,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:57,451 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-07-13 20:29:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:57,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549282310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:57,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:57,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:29:57,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026612349] [2021-07-13 20:29:57,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:29:57,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:57,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:29:57,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:29:57,505 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:57,724 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-13 20:29:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:29:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-07-13 20:29:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:57,726 INFO L225 Difference]: With dead ends: 330 [2021-07-13 20:29:57,726 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 20:29:57,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:29:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 20:29:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-13 20:29:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-13 20:29:57,733 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-13 20:29:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:57,734 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-13 20:29:57,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-13 20:29:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:29:57,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:57,735 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:57,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:57,955 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-07-13 20:29:57,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:57,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165256072] [2021-07-13 20:29:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:58,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:58,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165256072] [2021-07-13 20:29:58,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165256072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:58,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895839141] [2021-07-13 20:29:58,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:58,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:58,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:58,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:29:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:58,474 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:29:58,474 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 16 treesize of output 14 [2021-07-13 20:29:58,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:58,485 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:29:58,485 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 16 treesize of output 14 [2021-07-13 20:29:58,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:58,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:58,495 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 11 treesize of output 15 [2021-07-13 20:29:58,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:58,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:58,509 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 21 treesize of output 21 [2021-07-13 20:29:58,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:58,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:58,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:29:58,559 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-07-13 20:29:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:58,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895839141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:58,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:58,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 20:29:58,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034678960] [2021-07-13 20:29:58,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:29:58,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:58,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:29:58,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:29:58,655 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:59,106 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-13 20:29:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:29:59,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:29:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:59,109 INFO L225 Difference]: With dead ends: 374 [2021-07-13 20:29:59,109 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 20:29:59,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:29:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 20:29:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-13 20:29:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-13 20:29:59,115 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-13 20:29:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:59,115 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-13 20:29:59,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-13 20:29:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:29:59,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:59,116 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:59,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:59,333 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-07-13 20:29:59,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:59,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427144924] [2021-07-13 20:29:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:59,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:59,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427144924] [2021-07-13 20:29:59,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427144924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:59,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529191180] [2021-07-13 20:29:59,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:59,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:29:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:29:59,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:59,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:29:59,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:59,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:29:59,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:59,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:29:59,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:59,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 20:29:59,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:59,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:29:59,609 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:59,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:29:59,612 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:59,629 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:29:59,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:59,630 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-07-13 20:29:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:59,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529191180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:59,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:59,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:29:59,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668588801] [2021-07-13 20:29:59,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:29:59,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:29:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:29:59,661 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-07-13 20:29:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:59,821 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-07-13 20:29:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:29:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 22 [2021-07-13 20:29:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:59,823 INFO L225 Difference]: With dead ends: 296 [2021-07-13 20:29:59,823 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 20:29:59,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:29:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 20:29:59,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-07-13 20:29:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-13 20:29:59,828 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-13 20:29:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:59,829 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-13 20:29:59,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-07-13 20:29:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-13 20:29:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:29:59,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:59,829 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:00,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:30:00,047 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-07-13 20:30:00,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:00,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14418671] [2021-07-13 20:30:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:00,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:00,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14418671] [2021-07-13 20:30:00,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14418671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:00,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281787894] [2021-07-13 20:30:00,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:00,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:00,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:30:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:00,390 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:00,390 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 16 treesize of output 14 [2021-07-13 20:30:00,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:00,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:00,398 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 11 treesize of output 15 [2021-07-13 20:30:00,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:00,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:00,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:00,455 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 21 treesize of output 21 [2021-07-13 20:30:00,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:00,464 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:00,464 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 16 treesize of output 14 [2021-07-13 20:30:00,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:00,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:00,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:30:00,518 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-07-13 20:30:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:00,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281787894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:00,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:00,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:30:00,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465616494] [2021-07-13 20:30:00,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:00,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:00,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:00,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:00,635 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:00,955 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-07-13 20:30:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:30:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 22 [2021-07-13 20:30:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:00,958 INFO L225 Difference]: With dead ends: 409 [2021-07-13 20:30:00,958 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 20:30:00,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:30:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 20:30:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-07-13 20:30:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-13 20:30:00,966 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-13 20:30:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:00,966 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-13 20:30:00,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-13 20:30:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:00,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:00,967 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:01,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:01,185 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-07-13 20:30:01,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:01,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56435829] [2021-07-13 20:30:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:01,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:01,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56435829] [2021-07-13 20:30:01,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56435829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:01,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878941561] [2021-07-13 20:30:01,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:01,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:01,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:01,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878941561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:01,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:01,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:30:01,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954205200] [2021-07-13 20:30:01,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:30:01,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:30:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:30:01,353 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:01,730 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-13 20:30:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:30:01,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-07-13 20:30:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:01,734 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:30:01,734 INFO L226 Difference]: Without dead ends: 619 [2021-07-13 20:30:01,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:30:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-13 20:30:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-13 20:30:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-13 20:30:01,747 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-13 20:30:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:01,748 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-13 20:30:01,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-13 20:30:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:01,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:01,749 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:01,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:30:01,973 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-07-13 20:30:01,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:01,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144055467] [2021-07-13 20:30:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:02,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:02,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144055467] [2021-07-13 20:30:02,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144055467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:02,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045837574] [2021-07-13 20:30:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:02,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:02,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:02,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:02,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045837574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:02,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:02,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:02,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979094722] [2021-07-13 20:30:02,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:02,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:02,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:02,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:02,165 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:02,872 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-13 20:30:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:30:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:02,877 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 20:30:02,878 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 20:30:02,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:30:02,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 20:30:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-13 20:30:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-13 20:30:02,891 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-13 20:30:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:02,891 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-13 20:30:02,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-13 20:30:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:02,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:02,892 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:03,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:03,109 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:03,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-07-13 20:30:03,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:03,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177973681] [2021-07-13 20:30:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:03,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:03,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177973681] [2021-07-13 20:30:03,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177973681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:03,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602100231] [2021-07-13 20:30:03,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:03,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602100231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:03,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:03,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:03,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016490043] [2021-07-13 20:30:03,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:03,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:03,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:03,323 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:03,937 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-13 20:30:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:30:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:03,941 INFO L225 Difference]: With dead ends: 951 [2021-07-13 20:30:03,941 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 20:30:03,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:30:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 20:30:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-13 20:30:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-13 20:30:03,952 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-13 20:30:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:03,952 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-13 20:30:03,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-13 20:30:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:03,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:03,953 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:04,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:04,173 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-07-13 20:30:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:04,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810241070] [2021-07-13 20:30:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:04,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810241070] [2021-07-13 20:30:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810241070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823765035] [2021-07-13 20:30:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:04,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:30:04,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:04,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823765035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:04,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:04,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:30:04,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103393763] [2021-07-13 20:30:04,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:30:04,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:04,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:30:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:30:04,298 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:04,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:04,394 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-13 20:30:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:30:04,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:04,397 INFO L225 Difference]: With dead ends: 669 [2021-07-13 20:30:04,397 INFO L226 Difference]: Without dead ends: 663 [2021-07-13 20:30:04,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-13 20:30:04,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-13 20:30:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-13 20:30:04,407 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-13 20:30:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:04,407 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-13 20:30:04,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-13 20:30:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:04,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:04,408 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:04,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:30:04,625 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-07-13 20:30:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:04,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729634284] [2021-07-13 20:30:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:04,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:04,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729634284] [2021-07-13 20:30:04,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729634284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:04,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743235461] [2021-07-13 20:30:04,659 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:04,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:04,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743235461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:04,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:04,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:30:04,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160809239] [2021-07-13 20:30:04,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:04,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:04,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:04,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:04,780 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:04,940 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-13 20:30:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:30:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-07-13 20:30:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:04,943 INFO L225 Difference]: With dead ends: 710 [2021-07-13 20:30:04,943 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:30:04,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:30:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:30:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-13 20:30:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-13 20:30:04,955 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-13 20:30:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:04,955 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-13 20:30:04,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-13 20:30:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:04,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:04,956 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:05,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:05,175 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:05,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-07-13 20:30:05,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:05,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19958370] [2021-07-13 20:30:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:05,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:05,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19958370] [2021-07-13 20:30:05,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19958370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:05,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67328590] [2021-07-13 20:30:05,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:05,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:05,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:30:05,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:05,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67328590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:05,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:05,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:30:05,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004010875] [2021-07-13 20:30:05,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:30:05,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:05,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:30:05,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:30:05,285 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:05,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:05,380 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-13 20:30:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:30:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:05,384 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:30:05,384 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 20:30:05,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:05,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 20:30:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-13 20:30:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-13 20:30:05,401 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-13 20:30:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:05,401 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-13 20:30:05,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-13 20:30:05,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:05,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:05,403 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:05,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:30:05,627 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:05,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:05,627 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-07-13 20:30:05,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:05,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135957086] [2021-07-13 20:30:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:05,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135957086] [2021-07-13 20:30:05,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135957086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:05,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319244277] [2021-07-13 20:30:05,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:05,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:05,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319244277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:05,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:05,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:30:05,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769013811] [2021-07-13 20:30:05,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:30:05,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:05,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:30:05,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:30:05,791 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:06,182 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-13 20:30:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:30:06,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:06,188 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 20:30:06,188 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 20:30:06,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:30:06,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 20:30:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-13 20:30:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-13 20:30:06,204 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-13 20:30:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:06,204 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-13 20:30:06,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-13 20:30:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:06,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:06,206 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:06,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:30:06,421 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:06,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-07-13 20:30:06,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:06,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729032013] [2021-07-13 20:30:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:06,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729032013] [2021-07-13 20:30:06,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729032013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16711833] [2021-07-13 20:30:06,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:06,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:06,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:06,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16711833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:06,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:06,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:30:06,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020603854] [2021-07-13 20:30:06,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:30:06,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:06,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:30:06,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:30:06,563 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:06,958 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-13 20:30:06,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:30:06,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:06,964 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 20:30:06,964 INFO L226 Difference]: Without dead ends: 1492 [2021-07-13 20:30:06,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:30:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-13 20:30:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-13 20:30:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-13 20:30:06,984 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-13 20:30:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:06,984 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-13 20:30:06,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-13 20:30:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:06,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:06,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:07,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:30:07,208 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:07,208 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-07-13 20:30:07,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:07,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377187825] [2021-07-13 20:30:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:07,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377187825] [2021-07-13 20:30:07,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377187825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089860921] [2021-07-13 20:30:07,267 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:07,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:07,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:07,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:07,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:07,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089860921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:07,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:07,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:30:07,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114095446] [2021-07-13 20:30:07,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:07,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:07,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:07,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:07,390 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:07,622 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-13 20:30:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:30:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-07-13 20:30:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:07,626 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 20:30:07,626 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 20:30:07,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:30:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 20:30:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-13 20:30:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-13 20:30:07,644 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-13 20:30:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:07,644 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-13 20:30:07,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-13 20:30:07,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:07,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:07,646 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:07,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-13 20:30:07,864 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:07,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-07-13 20:30:07,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:07,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316120635] [2021-07-13 20:30:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:07,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:07,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316120635] [2021-07-13 20:30:07,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316120635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:07,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204161782] [2021-07-13 20:30:07,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:07,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:07,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:07,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:07,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:08,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204161782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:08,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:08,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:30:08,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851025627] [2021-07-13 20:30:08,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:08,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:08,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:08,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:08,006 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:08,299 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-13 20:30:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:30:08,299 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-07-13 20:30:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:08,304 INFO L225 Difference]: With dead ends: 1329 [2021-07-13 20:30:08,304 INFO L226 Difference]: Without dead ends: 1329 [2021-07-13 20:30:08,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-13 20:30:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-13 20:30:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-13 20:30:08,321 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-13 20:30:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:08,321 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-13 20:30:08,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-13 20:30:08,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:08,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:08,322 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:08,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:08,539 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:08,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-07-13 20:30:08,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:08,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601287527] [2021-07-13 20:30:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:08,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:08,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601287527] [2021-07-13 20:30:08,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601287527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:08,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560544320] [2021-07-13 20:30:08,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:08,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:08,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560544320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:08,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:08,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:30:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322720415] [2021-07-13 20:30:08,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:30:08,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:30:08,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:30:08,693 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:09,061 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-13 20:30:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:30:09,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:09,068 INFO L225 Difference]: With dead ends: 1548 [2021-07-13 20:30:09,068 INFO L226 Difference]: Without dead ends: 1544 [2021-07-13 20:30:09,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:30:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-13 20:30:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-13 20:30:09,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-13 20:30:09,089 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-13 20:30:09,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:09,090 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-13 20:30:09,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-13 20:30:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:09,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:09,091 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:09,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:09,308 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:09,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-07-13 20:30:09,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:09,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474768786] [2021-07-13 20:30:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:09,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:09,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474768786] [2021-07-13 20:30:09,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474768786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:09,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309960090] [2021-07-13 20:30:09,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:09,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:09,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:09,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:09,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309960090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:09,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:09,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:09,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972824115] [2021-07-13 20:30:09,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:09,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:09,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:09,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:09,458 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:10,161 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-13 20:30:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:30:10,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:10,172 INFO L225 Difference]: With dead ends: 2734 [2021-07-13 20:30:10,172 INFO L226 Difference]: Without dead ends: 2734 [2021-07-13 20:30:10,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:30:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-13 20:30:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-13 20:30:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-13 20:30:10,202 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-13 20:30:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:10,202 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-13 20:30:10,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-13 20:30:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:10,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:10,204 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:10,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:10,420 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:10,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-07-13 20:30:10,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:10,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016450438] [2021-07-13 20:30:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:10,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:10,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016450438] [2021-07-13 20:30:10,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016450438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:10,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719901924] [2021-07-13 20:30:10,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:10,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:10,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:10,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719901924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:10,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:10,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:10,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723490239] [2021-07-13 20:30:10,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:10,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:10,552 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:11,268 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-13 20:30:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:30:11,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:11,277 INFO L225 Difference]: With dead ends: 2693 [2021-07-13 20:30:11,277 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 20:30:11,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:30:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 20:30:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-13 20:30:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-13 20:30:11,309 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-13 20:30:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:11,309 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-13 20:30:11,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-13 20:30:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:11,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:11,311 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:11,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:30:11,528 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-07-13 20:30:11,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:11,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338123850] [2021-07-13 20:30:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:11,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:11,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338123850] [2021-07-13 20:30:11,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338123850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:11,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785696338] [2021-07-13 20:30:11,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:11,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:11,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:11,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:11,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:11,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785696338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:11,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:11,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:30:11,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789832558] [2021-07-13 20:30:11,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:30:11,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:30:11,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:30:11,668 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:12,284 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-13 20:30:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:30:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-07-13 20:30:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:12,291 INFO L225 Difference]: With dead ends: 2677 [2021-07-13 20:30:12,291 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 20:30:12,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:30:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 20:30:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-13 20:30:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-13 20:30:12,321 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-13 20:30:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:12,322 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-13 20:30:12,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-13 20:30:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:12,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:12,324 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:12,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:30:12,543 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-07-13 20:30:12,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:12,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364932316] [2021-07-13 20:30:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:12,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364932316] [2021-07-13 20:30:12,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364932316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:12,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541808376] [2021-07-13 20:30:12,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:12,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:30:12,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:12,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:12,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541808376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:12,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:12,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:30:12,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322106791] [2021-07-13 20:30:12,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:30:12,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:12,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:30:12,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:30:12,694 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:13,298 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-13 20:30:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:30:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-07-13 20:30:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:13,304 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 20:30:13,304 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 20:30:13,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:30:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 20:30:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-13 20:30:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-13 20:30:13,332 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-13 20:30:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:13,332 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-13 20:30:13,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-13 20:30:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:13,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:13,334 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:13,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:30:13,553 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-07-13 20:30:13,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:13,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584440425] [2021-07-13 20:30:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:13,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:13,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584440425] [2021-07-13 20:30:13,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584440425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:13,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219607511] [2021-07-13 20:30:13,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:13,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:30:13,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:13,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:13,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219607511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:13,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:13,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:13,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014350573] [2021-07-13 20:30:13,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:13,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:13,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:13,695 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:14,336 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-13 20:30:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:30:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:30:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:14,342 INFO L225 Difference]: With dead ends: 2514 [2021-07-13 20:30:14,342 INFO L226 Difference]: Without dead ends: 2514 [2021-07-13 20:30:14,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:30:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-13 20:30:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-13 20:30:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-13 20:30:14,370 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-13 20:30:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:14,370 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-13 20:30:14,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-13 20:30:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:14,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:14,372 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:14,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:30:14,591 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-07-13 20:30:14,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:14,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232979931] [2021-07-13 20:30:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:14,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232979931] [2021-07-13 20:30:14,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232979931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707285632] [2021-07-13 20:30:14,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:14,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:14,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:14,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707285632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:14,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:14,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:14,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549391112] [2021-07-13 20:30:14,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:14,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:14,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:14,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:14,719 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:15,325 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-13 20:30:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:30:15,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:30:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:15,331 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 20:30:15,331 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 20:30:15,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:30:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 20:30:15,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-13 20:30:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-13 20:30:15,354 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-13 20:30:15,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:15,355 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-13 20:30:15,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-13 20:30:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:15,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:15,357 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:15,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:30:15,573 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-07-13 20:30:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:15,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527828183] [2021-07-13 20:30:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:15,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:15,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527828183] [2021-07-13 20:30:15,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527828183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:15,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557609014] [2021-07-13 20:30:15,595 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:15,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:30:15,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:15,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:30:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:15,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557609014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:15,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:15,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:30:15,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170213272] [2021-07-13 20:30:15,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:30:15,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:15,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:30:15,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:30:15,666 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:15,753 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-13 20:30:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:30:15,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:15,755 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:30:15,755 INFO L226 Difference]: Without dead ends: 929 [2021-07-13 20:30:15,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:30:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-13 20:30:15,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-13 20:30:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-13 20:30:15,776 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-13 20:30:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:15,777 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-13 20:30:15,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-13 20:30:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:15,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:15,779 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:15,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:15,995 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-07-13 20:30:15,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:15,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148219950] [2021-07-13 20:30:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:16,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:16,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148219950] [2021-07-13 20:30:16,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148219950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:16,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801524225] [2021-07-13 20:30:16,051 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:16,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:16,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:16,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:16,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:16,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801524225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:16,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:16,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:30:16,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908865472] [2021-07-13 20:30:16,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:30:16,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:16,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:30:16,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:30:16,140 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:16,433 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-13 20:30:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:30:16,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:16,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:16,436 INFO L225 Difference]: With dead ends: 1555 [2021-07-13 20:30:16,436 INFO L226 Difference]: Without dead ends: 1555 [2021-07-13 20:30:16,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-13 20:30:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-13 20:30:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-13 20:30:16,454 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-13 20:30:16,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:16,454 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-13 20:30:16,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-13 20:30:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:16,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:16,456 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:16,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:16,674 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:16,674 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-07-13 20:30:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:16,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198462667] [2021-07-13 20:30:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:16,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:16,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198462667] [2021-07-13 20:30:16,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198462667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:16,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954331137] [2021-07-13 20:30:16,716 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:16,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:16,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:16,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954331137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:16,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:16,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:30:16,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213232781] [2021-07-13 20:30:16,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:30:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:16,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:30:16,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:30:16,793 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:17,032 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-13 20:30:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:30:17,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:17,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:17,035 INFO L225 Difference]: With dead ends: 1605 [2021-07-13 20:30:17,035 INFO L226 Difference]: Without dead ends: 1605 [2021-07-13 20:30:17,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:30:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-13 20:30:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-13 20:30:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-13 20:30:17,052 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-13 20:30:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:17,052 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-13 20:30:17,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-13 20:30:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:17,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:17,054 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:17,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:17,271 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:17,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:17,272 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-07-13 20:30:17,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:17,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198886050] [2021-07-13 20:30:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:17,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:17,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198886050] [2021-07-13 20:30:17,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198886050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:17,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178472292] [2021-07-13 20:30:17,302 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:17,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:17,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:17,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:17,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178472292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:17,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:17,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:30:17,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397306605] [2021-07-13 20:30:17,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:30:17,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:17,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:30:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:30:17,386 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:17,579 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-13 20:30:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:30:17,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:17,582 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:30:17,582 INFO L226 Difference]: Without dead ends: 1520 [2021-07-13 20:30:17,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:30:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-13 20:30:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-13 20:30:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-13 20:30:17,598 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-13 20:30:17,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:17,599 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-13 20:30:17,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-13 20:30:17,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:17,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:17,601 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:17,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-13 20:30:17,817 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:17,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-07-13 20:30:17,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:17,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757087856] [2021-07-13 20:30:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:17,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:17,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757087856] [2021-07-13 20:30:17,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757087856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:17,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996328085] [2021-07-13 20:30:17,843 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:17,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:17,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:17,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:17,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:18,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996328085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:18,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:18,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:30:18,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033894622] [2021-07-13 20:30:18,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:30:18,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:18,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:30:18,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:30:18,034 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:18,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:18,257 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-13 20:30:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:30:18,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:18,260 INFO L225 Difference]: With dead ends: 1508 [2021-07-13 20:30:18,260 INFO L226 Difference]: Without dead ends: 1496 [2021-07-13 20:30:18,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-13 20:30:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-13 20:30:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-13 20:30:18,275 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-13 20:30:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:18,275 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-13 20:30:18,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-13 20:30:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:18,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:18,277 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:18,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:18,494 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-07-13 20:30:18,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:18,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623441494] [2021-07-13 20:30:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:18,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:18,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623441494] [2021-07-13 20:30:18,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623441494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:18,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303003766] [2021-07-13 20:30:18,527 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:18,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:18,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:18,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:18,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303003766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:18,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:18,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:18,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831543081] [2021-07-13 20:30:18,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:18,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:18,637 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:19,082 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-13 20:30:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:30:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:19,086 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:30:19,086 INFO L226 Difference]: Without dead ends: 2412 [2021-07-13 20:30:19,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:30:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-13 20:30:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-13 20:30:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-13 20:30:19,106 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-13 20:30:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:19,107 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-13 20:30:19,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-13 20:30:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:19,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:19,108 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:19,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 20:30:19,324 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-07-13 20:30:19,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:19,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308823715] [2021-07-13 20:30:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:19,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:19,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308823715] [2021-07-13 20:30:19,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308823715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:19,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059639615] [2021-07-13 20:30:19,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:30:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:19,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:19,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059639615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:19,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:19,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:19,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451371057] [2021-07-13 20:30:19,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:19,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:19,447 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:19,917 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-13 20:30:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:30:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:30:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:19,922 INFO L225 Difference]: With dead ends: 2335 [2021-07-13 20:30:19,922 INFO L226 Difference]: Without dead ends: 2335 [2021-07-13 20:30:19,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:30:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-13 20:30:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-13 20:30:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:30:19,954 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:30:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:19,954 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:30:19,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:30:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:19,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:19,956 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:20,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:20,170 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:20,171 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-07-13 20:30:20,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:20,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857130080] [2021-07-13 20:30:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:20,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857130080] [2021-07-13 20:30:20,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857130080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539988713] [2021-07-13 20:30:20,210 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:20,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:20,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:20,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:20,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:20,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539988713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:20,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:20,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:30:20,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760590055] [2021-07-13 20:30:20,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:30:20,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:20,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:30:20,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:30:20,294 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:20,686 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-13 20:30:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:30:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-07-13 20:30:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:20,690 INFO L225 Difference]: With dead ends: 2285 [2021-07-13 20:30:20,690 INFO L226 Difference]: Without dead ends: 2285 [2021-07-13 20:30:20,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:30:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-13 20:30:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-13 20:30:20,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 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) [2021-07-13 20:30:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:30:20,713 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:30:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:20,714 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:30:20,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:30:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:20,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:20,715 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:20,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:30:20,932 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-07-13 20:30:20,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:20,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494527610] [2021-07-13 20:30:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:20,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:20,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494527610] [2021-07-13 20:30:20,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494527610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:20,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188018808] [2021-07-13 20:30:20,958 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:20,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:20,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:20,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:20,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:21,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188018808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:21,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:21,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:30:21,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295817003] [2021-07-13 20:30:21,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:30:21,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:21,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:30:21,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:30:21,038 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:21,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:21,389 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-13 20:30:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:30:21,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-07-13 20:30:21,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:21,393 INFO L225 Difference]: With dead ends: 2176 [2021-07-13 20:30:21,393 INFO L226 Difference]: Without dead ends: 2172 [2021-07-13 20:30:21,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:30:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-13 20:30:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-13 20:30:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:30:21,440 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:30:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:21,440 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:30:21,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:30:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:21,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:21,442 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:21,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:21,658 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:21,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-07-13 20:30:21,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:21,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899812290] [2021-07-13 20:30:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:21,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899812290] [2021-07-13 20:30:21,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899812290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40999792] [2021-07-13 20:30:21,687 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:21,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:21,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:21,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:21,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40999792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:21,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:21,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:21,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886782072] [2021-07-13 20:30:21,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:21,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:21,787 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:22,158 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-13 20:30:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:30:22,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:30:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:22,163 INFO L225 Difference]: With dead ends: 2199 [2021-07-13 20:30:22,163 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 20:30:22,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 20:30:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-13 20:30:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 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) [2021-07-13 20:30:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:30:22,187 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:30:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:22,187 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:30:22,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:30:22,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:22,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:22,189 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:22,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:30:22,407 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:22,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:22,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-07-13 20:30:22,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:22,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898282977] [2021-07-13 20:30:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:22,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:22,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898282977] [2021-07-13 20:30:22,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898282977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:22,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417138539] [2021-07-13 20:30:22,434 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:22,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:22,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:22,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417138539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:22,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:22,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:22,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239341808] [2021-07-13 20:30:22,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:22,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:22,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:22,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:22,531 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:22,875 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-13 20:30:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:30:22,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:30:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:22,879 INFO L225 Difference]: With dead ends: 2156 [2021-07-13 20:30:22,880 INFO L226 Difference]: Without dead ends: 2152 [2021-07-13 20:30:22,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:30:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-13 20:30:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-13 20:30:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:30:22,902 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:30:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:22,902 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:30:22,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:30:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:22,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:22,904 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:23,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:30:23,125 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:23,126 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-07-13 20:30:23,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:23,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66616259] [2021-07-13 20:30:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:23,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66616259] [2021-07-13 20:30:23,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66616259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186430147] [2021-07-13 20:30:23,160 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:23,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:23,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:23,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:23,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186430147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:23,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:23,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:30:23,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64833647] [2021-07-13 20:30:23,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:30:23,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:30:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:30:23,252 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:30:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:23,579 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-13 20:30:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:30:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-07-13 20:30:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:23,582 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:30:23,582 INFO L226 Difference]: Without dead ends: 2097 [2021-07-13 20:30:23,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:23,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-13 20:30:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-13 20:30:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-13 20:30:23,603 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-13 20:30:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:23,603 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-13 20:30:23,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:30:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-13 20:30:23,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:23,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:23,605 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:23,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:23,822 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-07-13 20:30:23,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:23,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481845044] [2021-07-13 20:30:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:23,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:23,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481845044] [2021-07-13 20:30:23,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481845044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:23,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488890958] [2021-07-13 20:30:23,850 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:23,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488890958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:23,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:23,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:30:23,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141076006] [2021-07-13 20:30:23,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:30:23,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:23,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:30:23,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:30:23,923 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:30:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:24,204 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-13 20:30:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:30:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-07-13 20:30:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:24,207 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 20:30:24,207 INFO L226 Difference]: Without dead ends: 1959 [2021-07-13 20:30:24,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:30:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-13 20:30:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-13 20:30:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:24,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-13 20:30:24,228 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-13 20:30:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:24,228 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-13 20:30:24,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:30:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-13 20:30:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:24,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:24,230 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:24,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-13 20:30:24,448 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:24,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-07-13 20:30:24,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:24,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220350332] [2021-07-13 20:30:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:24,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:24,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220350332] [2021-07-13 20:30:24,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220350332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:24,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021859843] [2021-07-13 20:30:24,476 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:24,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:24,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:24,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:24,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:24,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021859843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:24,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:24,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:30:24,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873191600] [2021-07-13 20:30:24,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:30:24,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:24,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:30:24,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:30:24,544 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:30:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:24,759 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-13 20:30:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:30:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-07-13 20:30:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:24,762 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 20:30:24,762 INFO L226 Difference]: Without dead ends: 1716 [2021-07-13 20:30:24,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-13 20:30:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-13 20:30:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-13 20:30:24,780 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-13 20:30:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:24,780 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-13 20:30:24,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-13 20:30:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-13 20:30:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:24,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:24,782 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:24,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:24,998 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:24,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:24,998 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-07-13 20:30:24,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:24,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455028777] [2021-07-13 20:30:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:25,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455028777] [2021-07-13 20:30:25,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455028777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028382312] [2021-07-13 20:30:25,029 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:25,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:25,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:25,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:25,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028382312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:25,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:25,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:25,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208672049] [2021-07-13 20:30:25,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:25,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:25,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:25,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:25,131 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:25,452 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-13 20:30:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:30:25,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:30:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:25,455 INFO L225 Difference]: With dead ends: 1821 [2021-07-13 20:30:25,455 INFO L226 Difference]: Without dead ends: 1821 [2021-07-13 20:30:25,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:30:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-13 20:30:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-13 20:30:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-13 20:30:25,474 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-13 20:30:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:25,474 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-13 20:30:25,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-13 20:30:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:25,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:25,476 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:25,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 20:30:25,693 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-07-13 20:30:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138388613] [2021-07-13 20:30:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:25,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:25,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138388613] [2021-07-13 20:30:25,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138388613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:25,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973170907] [2021-07-13 20:30:25,722 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:25,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:25,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:25,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:25,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:25,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973170907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:25,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:25,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:30:25,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761828636] [2021-07-13 20:30:25,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:30:25,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:25,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:30:25,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:30:25,807 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:26,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:26,081 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-13 20:30:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:30:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:30:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:26,085 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:30:26,085 INFO L226 Difference]: Without dead ends: 1786 [2021-07-13 20:30:26,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:30:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-13 20:30:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-13 20:30:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-13 20:30:26,110 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-13 20:30:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:26,110 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-13 20:30:26,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-13 20:30:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:30:26,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:26,113 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:26,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 20:30:26,334 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-07-13 20:30:26,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:26,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983721052] [2021-07-13 20:30:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:26,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:26,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983721052] [2021-07-13 20:30:26,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983721052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:26,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865319222] [2021-07-13 20:30:26,382 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:26,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:26,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:30:26,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:26,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865319222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:26,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:26,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:30:26,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607579560] [2021-07-13 20:30:26,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:30:26,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:26,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:30:26,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:30:26,475 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:26,643 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-13 20:30:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:30:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-07-13 20:30:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:26,646 INFO L225 Difference]: With dead ends: 1649 [2021-07-13 20:30:26,647 INFO L226 Difference]: Without dead ends: 1637 [2021-07-13 20:30:26,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:30:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-13 20:30:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-13 20:30:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-13 20:30:26,664 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-13 20:30:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:26,664 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-13 20:30:26,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-13 20:30:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:26,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:26,666 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:26,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:26,882 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:26,882 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-07-13 20:30:26,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:26,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343250538] [2021-07-13 20:30:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:27,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:27,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343250538] [2021-07-13 20:30:27,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343250538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:27,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797209995] [2021-07-13 20:30:27,535 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 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 [2021-07-13 20:30:27,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:27,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:27,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:30:27,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:28,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,037 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 31 treesize of output 19 [2021-07-13 20:30:28,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,044 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 28 treesize of output 16 [2021-07-13 20:30:28,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,050 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 21 treesize of output 13 [2021-07-13 20:30:28,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,057 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 36 treesize of output 19 [2021-07-13 20:30:28,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,063 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 21 treesize of output 13 [2021-07-13 20:30:28,064 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,070 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 33 treesize of output 19 [2021-07-13 20:30:28,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,078 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 33 treesize of output 19 [2021-07-13 20:30:28,079 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,088 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 28 treesize of output 16 [2021-07-13 20:30:28,089 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,095 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 26 treesize of output 13 [2021-07-13 20:30:28,096 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,101 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 28 treesize of output 16 [2021-07-13 20:30:28,102 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,108 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 33 treesize of output 19 [2021-07-13 20:30:28,109 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,115 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 28 treesize of output 16 [2021-07-13 20:30:28,116 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,123 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 26 treesize of output 13 [2021-07-13 20:30:28,125 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,132 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 33 treesize of output 19 [2021-07-13 20:30:28,133 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:28,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:28,137 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 31 treesize of output 19 [2021-07-13 20:30:28,138 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:28,226 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:30:28,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:30:28,228 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:30:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:28,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797209995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:28,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:28,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:30:28,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064303410] [2021-07-13 20:30:28,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:30:28,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:28,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:30:28,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:30:28,301 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:28,940 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-07-13 20:30:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:29,196 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-07-13 20:30:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:30:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:30:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:29,199 INFO L225 Difference]: With dead ends: 1531 [2021-07-13 20:30:29,199 INFO L226 Difference]: Without dead ends: 1516 [2021-07-13 20:30:29,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1352.4ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-07-13 20:30:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-07-13 20:30:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-13 20:30:29,217 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-13 20:30:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:29,218 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-13 20:30:29,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-13 20:30:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:29,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:29,220 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:29,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 20:30:29,437 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-07-13 20:30:29,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:29,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876369657] [2021-07-13 20:30:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:29,796 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-13 20:30:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:30,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:30,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876369657] [2021-07-13 20:30:30,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876369657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:30,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500228903] [2021-07-13 20:30:30,067 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:30,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:30,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:30,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:30:30,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:30,486 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 20:30:30,531 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-07-13 20:30:30,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:30,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:30:30,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:30,647 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:30:30,648 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:30:30,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:30,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:30,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:30,653 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 28 treesize of output 16 [2021-07-13 20:30:30,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:30,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:30,658 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 21 treesize of output 13 [2021-07-13 20:30:30,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:30,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:30,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:30,699 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 28 treesize of output 16 [2021-07-13 20:30:30,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:30,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:30,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:30:30,736 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:30:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:30,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500228903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:30,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:30,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:30:30,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26850229] [2021-07-13 20:30:30,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:30:30,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:30,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:30:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:30:30,793 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:31,609 INFO L93 Difference]: Finished difference Result 1509 states and 4945 transitions. [2021-07-13 20:30:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:30:31,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:30:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:31,612 INFO L225 Difference]: With dead ends: 1509 [2021-07-13 20:30:31,612 INFO L226 Difference]: Without dead ends: 1494 [2021-07-13 20:30:31,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1329.9ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-07-13 20:30:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1150. [2021-07-13 20:30:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-13 20:30:31,631 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-13 20:30:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:31,631 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-13 20:30:31,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-13 20:30:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:31,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:31,633 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:31,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:31,848 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-07-13 20:30:31,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:31,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039869086] [2021-07-13 20:30:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:32,380 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-13 20:30:32,518 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-07-13 20:30:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:32,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:32,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039869086] [2021-07-13 20:30:32,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039869086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:32,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462579250] [2021-07-13 20:30:32,645 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:32,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:32,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:32,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:33,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:30:33,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:30:33,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:30:33,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:30:33,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:30:33,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:30:33,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:30:33,225 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:30:33,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:30:33,261 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:30:33,269 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:30:33,277 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:30:33,285 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:30:33,293 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:30:33,300 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:30:33,306 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,331 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-13 20:30:33,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:33,333 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:30:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:33,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462579250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:33,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:33,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:30:33,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259470292] [2021-07-13 20:30:33,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:30:33,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:33,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:30:33,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:30:33,367 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:34,917 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-07-13 20:30:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:30:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:30:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:34,920 INFO L225 Difference]: With dead ends: 1607 [2021-07-13 20:30:34,920 INFO L226 Difference]: Without dead ends: 1592 [2021-07-13 20:30:34,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1966.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:30:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-13 20:30:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-07-13 20:30:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-13 20:30:34,936 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-13 20:30:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:34,936 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-13 20:30:34,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-13 20:30:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:34,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:34,938 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:35,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:30:35,154 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-07-13 20:30:35,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:35,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976065297] [2021-07-13 20:30:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:35,554 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-07-13 20:30:35,761 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-13 20:30:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:36,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:36,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976065297] [2021-07-13 20:30:36,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976065297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:36,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705080190] [2021-07-13 20:30:36,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:36,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:36,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:36,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,315 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:30:36,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:30:36,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:36,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 20:30:36,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:36,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-13 20:30:36,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,383 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:36,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-13 20:30:36,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,396 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:36,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-13 20:30:36,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,407 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:30:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-13 20:30:36,408 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,418 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:30:36,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-13 20:30:36,419 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,429 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:30:36,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-07-13 20:30:36,430 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,440 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:30:36,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-13 20:30:36,441 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,451 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:30:36,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-13 20:30:36,452 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,462 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:30:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:30:36,463 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:36,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-13 20:30:36,479 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:36,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:30:36,494 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,506 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:36,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-13 20:30:36,508 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:36,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-13 20:30:36,522 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,528 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:30:36,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:30:36,529 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:36,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:30:36,607 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-07-13 20:30:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:36,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705080190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:36,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:36,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:30:36,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630985324] [2021-07-13 20:30:36,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:30:36,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:36,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:30:36,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:30:36,814 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:37,574 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-07-13 20:30:37,848 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-13 20:30:37,983 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-13 20:30:38,286 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-13 20:30:38,454 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-13 20:30:38,731 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-13 20:30:38,896 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-07-13 20:30:39,162 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-07-13 20:30:39,328 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-13 20:30:39,961 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-07-13 20:30:40,263 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-07-13 20:30:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:40,410 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-07-13 20:30:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:30:40,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:30:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:40,414 INFO L225 Difference]: With dead ends: 1843 [2021-07-13 20:30:40,414 INFO L226 Difference]: Without dead ends: 1828 [2021-07-13 20:30:40,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3701.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:30:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-07-13 20:30:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-07-13 20:30:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-13 20:30:40,438 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-13 20:30:40,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:40,439 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-13 20:30:40,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-13 20:30:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:40,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:40,441 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:40,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:40,657 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-07-13 20:30:40,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:40,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437111302] [2021-07-13 20:30:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:41,071 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-13 20:30:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:41,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:41,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437111302] [2021-07-13 20:30:41,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437111302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:41,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836952013] [2021-07-13 20:30:41,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:30:41,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:41,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:30:41,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:30:41,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:30:41,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:30:41,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:30:41,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:30:41,894 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:30:41,903 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:30:41,913 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:30:41,921 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:30:41,928 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:30:41,935 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:30:41,941 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:30:41,947 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:30:41,958 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:41,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:41,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:30:41,963 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:41,983 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-13 20:30:41,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:41,984 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:30:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:42,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836952013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:42,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:42,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:30:42,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256868796] [2021-07-13 20:30:42,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:30:42,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:42,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:30:42,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:30:42,039 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:42,449 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-07-13 20:30:43,450 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-13 20:30:43,595 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-13 20:30:43,725 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-13 20:30:44,090 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-07-13 20:30:44,262 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-07-13 20:30:44,713 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2021-07-13 20:30:45,199 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-13 20:30:45,382 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-13 20:30:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:45,508 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-07-13 20:30:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:30:45,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:30:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:45,512 INFO L225 Difference]: With dead ends: 1877 [2021-07-13 20:30:45,512 INFO L226 Difference]: Without dead ends: 1862 [2021-07-13 20:30:45,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3547.5ms TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:30:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-07-13 20:30:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-07-13 20:30:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-13 20:30:45,532 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-13 20:30:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:45,532 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-13 20:30:45,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-13 20:30:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:45,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:45,535 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:45,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:45,756 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-07-13 20:30:45,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:45,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393299587] [2021-07-13 20:30:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:46,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:46,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393299587] [2021-07-13 20:30:46,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393299587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:46,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961703576] [2021-07-13 20:30:46,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:46,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:46,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:46,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:46,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:46,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:46,914 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 20:30:46,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:30:46,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:46,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:46,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:46,945 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-13 20:30:46,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:30:46,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:46,974 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:30:46,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2021-07-13 20:30:46,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:46,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,008 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-07-13 20:30:47,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-07-13 20:30:47,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,026 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:30:47,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:30:47,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,042 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:30:47,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:30:47,042 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,066 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-07-13 20:30:47,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-07-13 20:30:47,067 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,082 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:30:47,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:30:47,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,105 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-13 20:30:47,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:30:47,107 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,132 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:30:47,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:30:47,136 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,152 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:30:47,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:30:47,153 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,179 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:30:47,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-13 20:30:47,180 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:47,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-13 20:30:47,211 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,226 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:30:47,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:30:47,227 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,241 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:30:47,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:30:47,241 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:47,250 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:30:47,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:30:47,251 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,367 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-07-13 20:30:47,367 INFO L628 ElimStorePlain]: treesize reduction 126, result has 51.4 percent of original size [2021-07-13 20:30:47,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:30:47,370 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-07-13 20:30:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:47,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961703576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:47,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:47,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-13 20:30:47,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414522586] [2021-07-13 20:30:47,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:30:47,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:30:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:30:47,529 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:48,343 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-07-13 20:30:49,097 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-13 20:30:49,300 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2021-07-13 20:30:49,433 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-07-13 20:30:49,779 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-13 20:30:49,916 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-13 20:30:50,338 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-07-13 20:30:50,490 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-13 20:30:50,638 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-13 20:30:50,974 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 20:30:51,291 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-07-13 20:30:51,452 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-07-13 20:30:51,691 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-13 20:30:52,001 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-13 20:30:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:52,245 INFO L93 Difference]: Finished difference Result 2051 states and 6324 transitions. [2021-07-13 20:30:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:30:52,245 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:30:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:52,250 INFO L225 Difference]: With dead ends: 2051 [2021-07-13 20:30:52,250 INFO L226 Difference]: Without dead ends: 2006 [2021-07-13 20:30:52,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 4776.0ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:30:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-07-13 20:30:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1381. [2021-07-13 20:30:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-07-13 20:30:52,277 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-07-13 20:30:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:52,277 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-07-13 20:30:52,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-07-13 20:30:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:52,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:52,280 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:52,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-07-13 20:30:52,497 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-07-13 20:30:52,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:52,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434222121] [2021-07-13 20:30:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:53,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:53,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434222121] [2021-07-13 20:30:53,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434222121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:53,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455720993] [2021-07-13 20:30:53,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:53,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:53,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,490 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 33 treesize of output 19 [2021-07-13 20:30:53,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,495 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 28 treesize of output 16 [2021-07-13 20:30:53,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,501 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 31 treesize of output 19 [2021-07-13 20:30:53,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,506 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 28 treesize of output 16 [2021-07-13 20:30:53,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,512 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 26 treesize of output 13 [2021-07-13 20:30:53,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,517 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 21 treesize of output 13 [2021-07-13 20:30:53,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,522 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 33 treesize of output 19 [2021-07-13 20:30:53,523 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,528 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 21 treesize of output 13 [2021-07-13 20:30:53,528 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,532 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 33 treesize of output 19 [2021-07-13 20:30:53,533 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,537 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 26 treesize of output 13 [2021-07-13 20:30:53,538 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,542 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 28 treesize of output 16 [2021-07-13 20:30:53,543 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,547 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 36 treesize of output 19 [2021-07-13 20:30:53,547 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,551 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 33 treesize of output 19 [2021-07-13 20:30:53,552 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,556 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 28 treesize of output 16 [2021-07-13 20:30:53,557 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:53,559 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 31 treesize of output 19 [2021-07-13 20:30:53,560 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,632 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:30:53,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:30:53,633 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:30:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:53,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455720993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:53,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:53,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:30:53,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138680125] [2021-07-13 20:30:53,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:30:53,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:53,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:30:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:30:53,686 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:55,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:55,635 INFO L93 Difference]: Finished difference Result 1960 states and 6315 transitions. [2021-07-13 20:30:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:30:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:30:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:55,639 INFO L225 Difference]: With dead ends: 1960 [2021-07-13 20:30:55,639 INFO L226 Difference]: Without dead ends: 1945 [2021-07-13 20:30:55,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2121.3ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:30:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-13 20:30:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1425. [2021-07-13 20:30:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.3202247191011236) internal successors, (4728), 1424 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4728 transitions. [2021-07-13 20:30:55,659 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4728 transitions. Word has length 26 [2021-07-13 20:30:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:55,659 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4728 transitions. [2021-07-13 20:30:55,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4728 transitions. [2021-07-13 20:30:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:55,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:55,661 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:55,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:55,877 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-07-13 20:30:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:55,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012719714] [2021-07-13 20:30:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:56,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:56,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012719714] [2021-07-13 20:30:56,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012719714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:56,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862856326] [2021-07-13 20:30:56,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:56,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:56,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:56,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:30:56,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:56,774 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:30:56,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:56,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:56,849 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-07-13 20:30:56,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:56,989 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-13 20:30:56,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,013 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:30:57,013 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 20:30:57,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,150 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-13 20:30:57,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,173 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:30:57,173 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-07-13 20:30:57,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,308 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-13 20:30:57,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,330 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:30:57,330 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-07-13 20:30:57,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,469 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:30:57,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,486 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-07-13 20:30:57,492 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,607 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:30:57,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,624 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-07-13 20:30:57,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,750 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:30:57,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,768 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:30:57,769 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-07-13 20:30:57,770 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,895 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 20:30:57,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,936 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:30:57,936 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-07-13 20:30:57,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:58,055 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-13 20:30:58,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:58,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:30:58,071 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-07-13 20:30:58,347 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-13 20:30:58,561 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-07-13 20:30:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:58,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862856326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:58,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:58,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:30:58,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022597312] [2021-07-13 20:30:58,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:30:58,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:30:58,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:30:58,665 INFO L87 Difference]: Start difference. First operand 1425 states and 4728 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:59,678 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2021-07-13 20:31:00,022 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-07-13 20:31:00,359 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-07-13 20:31:00,642 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2021-07-13 20:31:00,968 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:31:01,422 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-13 20:31:01,805 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-07-13 20:31:01,932 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-13 20:31:02,235 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-07-13 20:31:02,529 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-07-13 20:31:02,931 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-07-13 20:31:03,259 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2021-07-13 20:31:03,817 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-07-13 20:31:03,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:03,896 INFO L93 Difference]: Finished difference Result 2026 states and 6474 transitions. [2021-07-13 20:31:03,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:31:03,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:31:03,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:03,899 INFO L225 Difference]: With dead ends: 2026 [2021-07-13 20:31:03,899 INFO L226 Difference]: Without dead ends: 2011 [2021-07-13 20:31:03,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 5610.0ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:31:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-07-13 20:31:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1444. [2021-07-13 20:31:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.324324324324324) internal successors, (4797), 1443 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4797 transitions. [2021-07-13 20:31:03,921 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4797 transitions. Word has length 26 [2021-07-13 20:31:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:03,921 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4797 transitions. [2021-07-13 20:31:03,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4797 transitions. [2021-07-13 20:31:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:03,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:03,923 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:04,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-13 20:31:04,134 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:04,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1506197498, now seen corresponding path program 9 times [2021-07-13 20:31:04,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:04,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013397077] [2021-07-13 20:31:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:04,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013397077] [2021-07-13 20:31:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013397077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755032472] [2021-07-13 20:31:04,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:04,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:31:04,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:04,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:04,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:05,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:05,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:05,206 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 21 treesize of output 13 [2021-07-13 20:31:05,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:05,211 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 26 treesize of output 13 [2021-07-13 20:31:05,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,338 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-13 20:31:05,338 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-07-13 20:31:05,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:05,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:05,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:05,345 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 28 treesize of output 16 [2021-07-13 20:31:05,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:05,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:31:05,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:05,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:05,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:05,399 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 28 treesize of output 16 [2021-07-13 20:31:05,400 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:05,448 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-07-13 20:31:05,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:31:05,451 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-07-13 20:31:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755032472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:05,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:05,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:31:05,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452216556] [2021-07-13 20:31:05,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:31:05,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:05,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:31:05,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:31:05,516 INFO L87 Difference]: Start difference. First operand 1444 states and 4797 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:06,089 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-07-13 20:31:06,479 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:31:06,662 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-07-13 20:31:07,038 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-07-13 20:31:07,341 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-13 20:31:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:07,395 INFO L93 Difference]: Finished difference Result 2027 states and 6512 transitions. [2021-07-13 20:31:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:31:07,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:31:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:07,399 INFO L225 Difference]: With dead ends: 2027 [2021-07-13 20:31:07,399 INFO L226 Difference]: Without dead ends: 2012 [2021-07-13 20:31:07,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2315.4ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:31:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-07-13 20:31:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1454. [2021-07-13 20:31:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.3269098417068137) internal successors, (4834), 1453 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4834 transitions. [2021-07-13 20:31:07,419 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4834 transitions. Word has length 26 [2021-07-13 20:31:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:07,419 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4834 transitions. [2021-07-13 20:31:07,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4834 transitions. [2021-07-13 20:31:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:07,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:07,422 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:07,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:07,638 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 10 times [2021-07-13 20:31:07,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:07,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608105632] [2021-07-13 20:31:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:08,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:08,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608105632] [2021-07-13 20:31:08,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608105632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:08,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789673200] [2021-07-13 20:31:08,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:08,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:08,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:08,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:08,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,349 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:08,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:31:08,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:08,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:31:08,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,375 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:08,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:31:08,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,388 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:31:08,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:31:08,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:08,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-13 20:31:08,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,416 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:08,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:31:08,417 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,427 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:08,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:31:08,427 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:08,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-13 20:31:08,444 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,456 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:08,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:31:08,457 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:08,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-13 20:31:08,475 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,486 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:08,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:31:08,487 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,499 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:08,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:31:08,500 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,514 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:31:08,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:31:08,516 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:08,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:31:08,528 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:08,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:31:08,543 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:08,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:08,552 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:31:08,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-13 20:31:08,553 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:08,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:08,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:31:08,626 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-13 20:31:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:08,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789673200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:08,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:08,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:31:08,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534056876] [2021-07-13 20:31:08,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:31:08,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:08,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:31:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:31:08,855 INFO L87 Difference]: Start difference. First operand 1454 states and 4834 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:10,776 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-13 20:31:11,049 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-07-13 20:31:11,298 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-13 20:31:11,536 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-07-13 20:31:11,675 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:31:11,873 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-07-13 20:31:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:12,004 INFO L93 Difference]: Finished difference Result 2385 states and 7601 transitions. [2021-07-13 20:31:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:31:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:31:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:12,008 INFO L225 Difference]: With dead ends: 2385 [2021-07-13 20:31:12,008 INFO L226 Difference]: Without dead ends: 2355 [2021-07-13 20:31:12,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3201.0ms TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:31:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-07-13 20:31:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1467. [2021-07-13 20:31:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.3342428376534787) internal successors, (4888), 1466 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4888 transitions. [2021-07-13 20:31:12,033 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4888 transitions. Word has length 26 [2021-07-13 20:31:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:12,033 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4888 transitions. [2021-07-13 20:31:12,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4888 transitions. [2021-07-13 20:31:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:12,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:12,035 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:12,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-13 20:31:12,251 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 11 times [2021-07-13 20:31:12,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:12,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892529559] [2021-07-13 20:31:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:12,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:12,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892529559] [2021-07-13 20:31:12,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892529559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:12,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033422663] [2021-07-13 20:31:12,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:12,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:31:12,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:12,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:12,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:13,166 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:31:13,345 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-07-13 20:31:13,411 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_37], 2=[v_prenex_39, v_prenex_38]} [2021-07-13 20:31:13,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:13,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:31:13,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:13,524 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:31:13,525 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.0 percent of original size [2021-07-13 20:31:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:13,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:31:13,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:13,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:13,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:13,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:13,577 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 28 treesize of output 16 [2021-07-13 20:31:13,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:13,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:13,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:13,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:13,622 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 21 treesize of output 13 [2021-07-13 20:31:13,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:13,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:13,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:13,626 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 28 treesize of output 16 [2021-07-13 20:31:13,627 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:13,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:13,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:31:13,661 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:205, output treesize:51 [2021-07-13 20:31:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:13,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033422663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:13,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:13,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:31:13,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068050312] [2021-07-13 20:31:13,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:31:13,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:13,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:31:13,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:31:13,719 INFO L87 Difference]: Start difference. First operand 1467 states and 4888 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:14,316 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-13 20:31:14,540 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-13 20:31:14,864 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-13 20:31:15,116 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-13 20:31:15,593 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-13 20:31:15,974 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-07-13 20:31:16,174 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-13 20:31:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:16,357 INFO L93 Difference]: Finished difference Result 1957 states and 6396 transitions. [2021-07-13 20:31:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:31:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:31:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:16,360 INFO L225 Difference]: With dead ends: 1957 [2021-07-13 20:31:16,360 INFO L226 Difference]: Without dead ends: 1942 [2021-07-13 20:31:16,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2960.5ms TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:31:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-07-13 20:31:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1470. [2021-07-13 20:31:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.3356024506466984) internal successors, (4900), 1469 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4900 transitions. [2021-07-13 20:31:16,382 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4900 transitions. Word has length 26 [2021-07-13 20:31:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:16,382 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4900 transitions. [2021-07-13 20:31:16,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4900 transitions. [2021-07-13 20:31:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:16,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:16,384 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:16,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-07-13 20:31:16,600 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:16,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1300110838, now seen corresponding path program 12 times [2021-07-13 20:31:16,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:16,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132239156] [2021-07-13 20:31:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:16,874 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-07-13 20:31:17,018 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-13 20:31:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:17,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:17,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132239156] [2021-07-13 20:31:17,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132239156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:17,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244489781] [2021-07-13 20:31:17,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:17,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:31:17,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:17,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:17,398 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-13 20:31:17,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:17,455 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:31:17,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:31:17,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:17,562 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:31:17,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:17,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:17,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:17,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:31:17,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:17,680 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:31:17,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:17,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:17,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:17,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:31:17,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:17,796 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:31:17,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:17,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:17,808 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:31:17,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:31:17,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:17,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:17,917 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:31:17,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:31:17,918 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:18,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:18,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:18,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:31:18,023 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:18,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:18,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:18,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:31:18,123 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:18,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:18,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:18,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:18,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:31:18,232 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:18,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:18,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:31:18,328 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:31:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:18,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244489781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:18,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:18,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:31:18,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169234130] [2021-07-13 20:31:18,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:31:18,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:18,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:31:18,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:31:18,531 INFO L87 Difference]: Start difference. First operand 1470 states and 4900 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:18,836 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-13 20:31:19,220 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2021-07-13 20:31:19,540 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-07-13 20:31:19,787 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:31:20,061 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-07-13 20:31:20,247 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:31:20,425 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-07-13 20:31:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:20,506 INFO L93 Difference]: Finished difference Result 2349 states and 7518 transitions. [2021-07-13 20:31:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:31:20,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:31:20,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:20,510 INFO L225 Difference]: With dead ends: 2349 [2021-07-13 20:31:20,510 INFO L226 Difference]: Without dead ends: 2319 [2021-07-13 20:31:20,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2351.2ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:31:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-07-13 20:31:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1476. [2021-07-13 20:31:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3403389830508474) internal successors, (4927), 1475 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4927 transitions. [2021-07-13 20:31:20,551 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4927 transitions. Word has length 26 [2021-07-13 20:31:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:20,551 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4927 transitions. [2021-07-13 20:31:20,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4927 transitions. [2021-07-13 20:31:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:20,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:20,554 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:20,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:20,765 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-07-13 20:31:20,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:20,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137035767] [2021-07-13 20:31:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:21,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:21,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137035767] [2021-07-13 20:31:21,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137035767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:21,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072180486] [2021-07-13 20:31:21,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:21,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:31:21,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:21,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:31:21,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:21,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-13 20:31:21,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:31:21,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-13 20:31:21,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-07-13 20:31:21,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2021-07-13 20:31:21,556 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-13 20:31:21,567 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-13 20:31:21,577 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:31:21,587 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-13 20:31:21,597 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-07-13 20:31:21,606 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:31:21,614 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-07-13 20:31:21,622 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:31:21,631 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-13 20:31:21,639 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-13 20:31:21,647 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:31:21,652 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,690 INFO L628 ElimStorePlain]: treesize reduction 48, result has 49.5 percent of original size [2021-07-13 20:31:21,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:21,691 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:921, output treesize:47 [2021-07-13 20:31:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:21,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072180486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:21,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:21,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:31:21,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437261175] [2021-07-13 20:31:21,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:31:21,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:31:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:31:21,771 INFO L87 Difference]: Start difference. First operand 1476 states and 4927 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:22,127 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-07-13 20:31:22,326 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-13 20:31:22,626 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-13 20:31:22,767 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-13 20:31:22,940 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-07-13 20:31:23,479 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-13 20:31:23,889 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 20:31:24,106 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-07-13 20:31:24,627 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-07-13 20:31:25,267 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-13 20:31:25,434 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-07-13 20:31:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:25,719 INFO L93 Difference]: Finished difference Result 3196 states and 9983 transitions. [2021-07-13 20:31:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:31:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:25,725 INFO L225 Difference]: With dead ends: 3196 [2021-07-13 20:31:25,725 INFO L226 Difference]: Without dead ends: 3109 [2021-07-13 20:31:25,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 3872.3ms TimeCoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:31:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-07-13 20:31:25,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1509. [2021-07-13 20:31:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.343501326259947) internal successors, (5042), 1508 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5042 transitions. [2021-07-13 20:31:25,755 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5042 transitions. Word has length 26 [2021-07-13 20:31:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:25,755 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5042 transitions. [2021-07-13 20:31:25,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5042 transitions. [2021-07-13 20:31:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:25,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:25,757 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:25,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-07-13 20:31:25,973 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:25,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-07-13 20:31:25,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:25,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822890174] [2021-07-13 20:31:25,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:26,269 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-13 20:31:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:26,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:26,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822890174] [2021-07-13 20:31:26,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822890174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:26,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616124876] [2021-07-13 20:31:26,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:26,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:26,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:26,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:31:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:31:27,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:31:27,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:31:27,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-13 20:31:27,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:31:27,220 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:31:27,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-13 20:31:27,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:31:27,246 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:31:27,254 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:31:27,262 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-13 20:31:27,270 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:31:27,278 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-13 20:31:27,286 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:31:27,294 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:31:27,300 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:27,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:31:27,305 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:27,336 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-13 20:31:27,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:27,337 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-07-13 20:31:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:27,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616124876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:27,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:27,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:31:27,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849859503] [2021-07-13 20:31:27,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:31:27,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:27,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:31:27,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:31:27,375 INFO L87 Difference]: Start difference. First operand 1509 states and 5042 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:27,903 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-07-13 20:31:28,206 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-13 20:31:28,364 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-07-13 20:31:28,808 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 20:31:29,251 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-07-13 20:31:29,539 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-07-13 20:31:30,041 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-07-13 20:31:30,188 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 20:31:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:30,416 INFO L93 Difference]: Finished difference Result 2965 states and 9388 transitions. [2021-07-13 20:31:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:31:30,417 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:30,422 INFO L225 Difference]: With dead ends: 2965 [2021-07-13 20:31:30,422 INFO L226 Difference]: Without dead ends: 2920 [2021-07-13 20:31:30,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3112.1ms TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:31:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-07-13 20:31:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1512. [2021-07-13 20:31:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.345466578424884) internal successors, (5055), 1511 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5055 transitions. [2021-07-13 20:31:30,452 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5055 transitions. Word has length 26 [2021-07-13 20:31:30,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:30,452 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5055 transitions. [2021-07-13 20:31:30,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:30,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5055 transitions. [2021-07-13 20:31:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:30,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:30,455 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:30,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-07-13 20:31:30,671 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:30,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:30,671 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-07-13 20:31:30,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:30,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338078314] [2021-07-13 20:31:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:31,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338078314] [2021-07-13 20:31:31,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338078314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516308443] [2021-07-13 20:31:31,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:31,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:31:31,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:31,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:31:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:31,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,580 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-13 20:31:31,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-07-13 20:31:31,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,608 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:31:31,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-07-13 20:31:31,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:31,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-13 20:31:31,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,668 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-13 20:31:31,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:31:31,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,688 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:31:31,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-07-13 20:31:31,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,713 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:31:31,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-13 20:31:31,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,738 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-13 20:31:31,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-07-13 20:31:31,740 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,753 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:31:31,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:31:31,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,766 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:31:31,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:31:31,766 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,778 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:31:31,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:31:31,779 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,791 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:31:31,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:31:31,791 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,808 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:31:31,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-13 20:31:31,809 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,821 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:31:31,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:31:31,821 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,833 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:31:31,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:31:31,833 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,855 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:31:31,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:31:31,856 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,864 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:31:31,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:31:31,865 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,933 INFO L628 ElimStorePlain]: treesize reduction 69, result has 64.2 percent of original size [2021-07-13 20:31:31,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:31:31,935 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-13 20:31:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:32,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516308443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:32,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:32,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:31:32,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540721590] [2021-07-13 20:31:32,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:31:32,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:31:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:31:32,027 INFO L87 Difference]: Start difference. First operand 1512 states and 5055 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:32,410 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-13 20:31:32,877 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-07-13 20:31:33,067 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-07-13 20:31:33,505 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-07-13 20:31:33,713 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-07-13 20:31:34,067 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-07-13 20:31:34,543 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-07-13 20:31:35,004 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-07-13 20:31:35,238 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-13 20:31:35,400 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-07-13 20:31:35,648 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-07-13 20:31:35,862 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2021-07-13 20:31:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:36,421 INFO L93 Difference]: Finished difference Result 3428 states and 10667 transitions. [2021-07-13 20:31:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:31:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:36,428 INFO L225 Difference]: With dead ends: 3428 [2021-07-13 20:31:36,428 INFO L226 Difference]: Without dead ends: 3368 [2021-07-13 20:31:36,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4154.0ms TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:31:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-07-13 20:31:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1525. [2021-07-13 20:31:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.356299212598425) internal successors, (5115), 1524 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5115 transitions. [2021-07-13 20:31:36,470 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5115 transitions. Word has length 26 [2021-07-13 20:31:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:36,470 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 5115 transitions. [2021-07-13 20:31:36,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5115 transitions. [2021-07-13 20:31:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:36,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:36,473 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:36,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-07-13 20:31:36,689 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:36,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-07-13 20:31:36,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:36,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238401695] [2021-07-13 20:31:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:37,063 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-07-13 20:31:37,242 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-07-13 20:31:37,408 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-13 20:31:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:37,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:37,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238401695] [2021-07-13 20:31:37,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238401695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:37,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613522177] [2021-07-13 20:31:37,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,889 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 26 treesize of output 13 [2021-07-13 20:31:37,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,895 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 28 treesize of output 16 [2021-07-13 20:31:37,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,901 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 33 treesize of output 19 [2021-07-13 20:31:37,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,906 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 21 treesize of output 13 [2021-07-13 20:31:37,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,911 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 28 treesize of output 16 [2021-07-13 20:31:37,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,917 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 33 treesize of output 19 [2021-07-13 20:31:37,917 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,922 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 31 treesize of output 19 [2021-07-13 20:31:37,923 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,928 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 28 treesize of output 16 [2021-07-13 20:31:37,928 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,933 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 33 treesize of output 19 [2021-07-13 20:31:37,934 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,939 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 21 treesize of output 13 [2021-07-13 20:31:37,939 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,944 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 26 treesize of output 13 [2021-07-13 20:31:37,945 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,949 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 31 treesize of output 19 [2021-07-13 20:31:37,950 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,954 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 28 treesize of output 16 [2021-07-13 20:31:37,955 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,959 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 33 treesize of output 19 [2021-07-13 20:31:37,960 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:37,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:37,963 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 36 treesize of output 19 [2021-07-13 20:31:37,964 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:38,033 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:31:38,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:31:38,035 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:31:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:38,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613522177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:38,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:38,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:31:38,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395460902] [2021-07-13 20:31:38,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:31:38,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:31:38,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:31:38,085 INFO L87 Difference]: Start difference. First operand 1525 states and 5115 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:38,796 INFO L93 Difference]: Finished difference Result 1908 states and 6274 transitions. [2021-07-13 20:31:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:31:38,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:31:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:38,800 INFO L225 Difference]: With dead ends: 1908 [2021-07-13 20:31:38,800 INFO L226 Difference]: Without dead ends: 1893 [2021-07-13 20:31:38,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1406.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:31:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-07-13 20:31:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1533. [2021-07-13 20:31:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.352480417754569) internal successors, (5136), 1532 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5136 transitions. [2021-07-13 20:31:38,822 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5136 transitions. Word has length 26 [2021-07-13 20:31:38,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:38,822 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5136 transitions. [2021-07-13 20:31:38,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5136 transitions. [2021-07-13 20:31:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:38,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:38,825 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:39,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-13 20:31:39,038 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:39,039 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-07-13 20:31:39,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:39,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600720195] [2021-07-13 20:31:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:39,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:39,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600720195] [2021-07-13 20:31:39,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600720195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:39,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458415706] [2021-07-13 20:31:39,673 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:39,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:39,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:39,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:31:39,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:40,048 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:31:40,158 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_60, v_prenex_62], 3=[A, v_prenex_54, v_prenex_64, v_prenex_58, v_prenex_56, v_prenex_66]} [2021-07-13 20:31:40,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,176 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:31:40,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:40,320 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-07-13 20:31:40,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,338 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:31:40,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:40,482 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:31:40,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:40,504 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:31:40,505 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-13 20:31:40,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:40,646 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:31:40,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:40,668 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:31:40,668 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:31:40,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:40,801 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-13 20:31:40,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:40,819 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:31:40,820 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:31:40,821 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:40,935 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:31:40,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:40,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,949 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-13 20:31:40,953 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:41,065 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:31:41,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:41,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:41,081 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:31:41,081 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:31:41,082 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:41,202 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:31:41,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:41,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:41,222 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:31:41,222 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:31:41,223 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:41,347 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-13 20:31:41,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:41,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:31:41,389 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:391, output treesize:457 [2021-07-13 20:31:41,656 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-07-13 20:31:41,860 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-07-13 20:31:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:41,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458415706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:41,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:41,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:31:41,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6152796] [2021-07-13 20:31:41,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:31:41,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:41,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:31:41,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:31:41,942 INFO L87 Difference]: Start difference. First operand 1533 states and 5136 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:42,806 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2021-07-13 20:31:43,188 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:31:43,715 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-07-13 20:31:43,883 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:31:44,295 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-13 20:31:44,708 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-07-13 20:31:45,015 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-07-13 20:31:45,210 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-07-13 20:31:45,646 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-07-13 20:31:45,842 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2021-07-13 20:31:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:45,896 INFO L93 Difference]: Finished difference Result 2211 states and 7083 transitions. [2021-07-13 20:31:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:31:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:31:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:45,901 INFO L225 Difference]: With dead ends: 2211 [2021-07-13 20:31:45,901 INFO L226 Difference]: Without dead ends: 2181 [2021-07-13 20:31:45,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 4540.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:31:45,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-07-13 20:31:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1518. [2021-07-13 20:31:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3513513513513513) internal successors, (5084), 1517 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5084 transitions. [2021-07-13 20:31:45,959 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5084 transitions. Word has length 26 [2021-07-13 20:31:45,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:45,959 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5084 transitions. [2021-07-13 20:31:45,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5084 transitions. [2021-07-13 20:31:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:45,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:45,962 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:46,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:46,193 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:46,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 15 times [2021-07-13 20:31:46,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:46,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002395934] [2021-07-13 20:31:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:46,444 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-13 20:31:46,700 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-13 20:31:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:46,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002395934] [2021-07-13 20:31:46,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002395934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129921307] [2021-07-13 20:31:46,823 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:46,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:31:46,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:46,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:31:46,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:47,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:47,100 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:31:47,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,139 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:31:47,139 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:31:47,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,151 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:31:47,151 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:31:47,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,168 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:31:47,168 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:31:47,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:47,180 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:31:47,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:47,195 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:31:47,196 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,210 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:31:47,210 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:31:47,210 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,218 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:31:47,218 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:31:47,222 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,237 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:31:47,237 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:31:47,240 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,260 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:31:47,260 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:31:47,267 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,275 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:31:47,275 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:31:47,276 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,283 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:31:47,283 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:31:47,284 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,291 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:31:47,292 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:31:47,292 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,300 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:31:47,300 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:31:47,301 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,321 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:31:47,321 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:31:47,322 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,335 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:31:47,335 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:31:47,336 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:47,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:31:47,456 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:430 [2021-07-13 20:31:47,731 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-13 20:31:47,916 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-13 20:31:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:48,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129921307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:48,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:48,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:31:48,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764340535] [2021-07-13 20:31:48,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:31:48,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:31:48,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:31:48,022 INFO L87 Difference]: Start difference. First operand 1518 states and 5084 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:48,639 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-07-13 20:31:49,147 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-07-13 20:31:49,328 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-07-13 20:31:49,578 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 58 [2021-07-13 20:31:49,736 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-13 20:31:49,954 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-13 20:31:50,486 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-13 20:31:50,767 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-13 20:31:51,048 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-07-13 20:31:51,270 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-07-13 20:31:51,554 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-07-13 20:31:51,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:51,630 INFO L93 Difference]: Finished difference Result 2207 states and 7076 transitions. [2021-07-13 20:31:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:31:51,630 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:31:51,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:51,634 INFO L225 Difference]: With dead ends: 2207 [2021-07-13 20:31:51,634 INFO L226 Difference]: Without dead ends: 2192 [2021-07-13 20:31:51,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4060.7ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:31:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-07-13 20:31:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1522. [2021-07-13 20:31:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.356344510190664) internal successors, (5105), 1521 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5105 transitions. [2021-07-13 20:31:51,675 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5105 transitions. Word has length 26 [2021-07-13 20:31:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:51,676 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5105 transitions. [2021-07-13 20:31:51,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5105 transitions. [2021-07-13 20:31:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:51,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:51,678 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:51,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:51,893 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 16 times [2021-07-13 20:31:51,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:51,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653121846] [2021-07-13 20:31:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:52,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:52,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653121846] [2021-07-13 20:31:52,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653121846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:52,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997104005] [2021-07-13 20:31:52,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:52,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:52,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:52,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:31:52,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:52,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:31:52,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:52,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:31:52,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:52,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:31:52,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,753 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:52,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:31:52,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,762 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:52,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:31:52,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,770 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:52,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:31:52,771 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,779 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:52,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:31:52,779 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:52,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:31:52,793 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,803 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:31:52,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:31:52,804 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,815 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:31:52,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:31:52,816 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,824 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:52,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:31:52,824 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,834 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:31:52,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:31:52,835 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:52,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:31:52,851 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:52,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:31:52,860 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:52,865 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:31:52,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:31:52,866 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:52,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:52,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:31:52,950 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-07-13 20:31:53,082 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-07-13 20:31:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:53,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997104005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:53,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:53,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:31:53,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026829137] [2021-07-13 20:31:53,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:31:53,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:31:53,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:31:53,167 INFO L87 Difference]: Start difference. First operand 1522 states and 5105 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:53,887 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-13 20:31:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:53,955 INFO L93 Difference]: Finished difference Result 2055 states and 6709 transitions. [2021-07-13 20:31:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:31:53,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:53,959 INFO L225 Difference]: With dead ends: 2055 [2021-07-13 20:31:53,959 INFO L226 Difference]: Without dead ends: 2040 [2021-07-13 20:31:53,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1185.8ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:31:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-07-13 20:31:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1529. [2021-07-13 20:31:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-07-13 20:31:53,980 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-07-13 20:31:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:53,981 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-07-13 20:31:53,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-07-13 20:31:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:53,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:53,983 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:54,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:54,201 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-07-13 20:31:54,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:54,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924930363] [2021-07-13 20:31:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:54,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:54,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924930363] [2021-07-13 20:31:54,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924930363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:54,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487754908] [2021-07-13 20:31:54,626 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:54,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:31:54,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:54,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:31:54,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:54,990 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-13 20:31:55,211 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-07-13 20:31:55,275 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_76], 2=[A, v_prenex_75]} [2021-07-13 20:31:55,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:55,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:31:55,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:55,380 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:31:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:55,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:55,384 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 28 treesize of output 16 [2021-07-13 20:31:55,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:55,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:55,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:55,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:55,431 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 28 treesize of output 16 [2021-07-13 20:31:55,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:55,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:55,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:55,435 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 21 treesize of output 13 [2021-07-13 20:31:55,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:55,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:55,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:31:55,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:31:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:55,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487754908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:55,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:55,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:31:55,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524441738] [2021-07-13 20:31:55,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:31:55,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:55,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:31:55,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:31:55,527 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:56,211 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-07-13 20:31:56,626 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:31:56,957 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-13 20:31:57,136 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-07-13 20:31:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:57,248 INFO L93 Difference]: Finished difference Result 2067 states and 6781 transitions. [2021-07-13 20:31:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:31:57,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:31:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:57,252 INFO L225 Difference]: With dead ends: 2067 [2021-07-13 20:31:57,252 INFO L226 Difference]: Without dead ends: 2052 [2021-07-13 20:31:57,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2233.0ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:31:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-07-13 20:31:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1532. [2021-07-13 20:31:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.357282821685173) internal successors, (5140), 1531 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5140 transitions. [2021-07-13 20:31:57,275 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5140 transitions. Word has length 26 [2021-07-13 20:31:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:57,275 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5140 transitions. [2021-07-13 20:31:57,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5140 transitions. [2021-07-13 20:31:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:57,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:57,278 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:57,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-07-13 20:31:57,494 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-07-13 20:31:57,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:57,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690472710] [2021-07-13 20:31:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:57,864 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-13 20:31:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:57,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:57,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690472710] [2021-07-13 20:31:57,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690472710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:57,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590339996] [2021-07-13 20:31:57,961 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:57,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:31:57,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:58,424 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:31:58,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:58,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:58,610 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:31:58,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:58,868 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 150 [2021-07-13 20:31:58,869 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-07-13 20:31:58,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:58,891 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:31:58,892 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:31:58,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,019 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-13 20:31:59,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:59,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,037 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:31:59,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,164 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-13 20:31:59,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:59,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,181 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:31:59,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,444 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-07-13 20:31:59,445 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-07-13 20:31:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:59,464 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:31:59,464 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:31:59,465 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,579 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-13 20:31:59,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:59,599 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:31:59,599 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:31:59,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,714 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:31:59,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:59,733 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:31:59,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:31:59,736 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,842 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:31:59,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:59,860 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:31:59,860 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:31:59,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,965 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:31:59,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:31:59,982 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:365, output treesize:256 [2021-07-13 20:32:00,164 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-13 20:32:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:00,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590339996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:00,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:00,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:32:00,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259418170] [2021-07-13 20:32:00,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:32:00,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:00,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:32:00,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:32:00,259 INFO L87 Difference]: Start difference. First operand 1532 states and 5140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:00,856 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-13 20:32:01,131 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-07-13 20:32:01,677 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 122 [2021-07-13 20:32:01,925 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-07-13 20:32:02,244 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:32:02,763 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2021-07-13 20:32:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:02,814 INFO L93 Difference]: Finished difference Result 2080 states and 6806 transitions. [2021-07-13 20:32:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:32:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:32:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:02,818 INFO L225 Difference]: With dead ends: 2080 [2021-07-13 20:32:02,818 INFO L226 Difference]: Without dead ends: 2065 [2021-07-13 20:32:02,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3217.9ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:32:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-07-13 20:32:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1529. [2021-07-13 20:32:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-07-13 20:32:02,840 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-07-13 20:32:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:02,840 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-07-13 20:32:02,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-07-13 20:32:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:02,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:02,842 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:03,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:03,057 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-07-13 20:32:03,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:03,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600455537] [2021-07-13 20:32:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:03,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:03,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600455537] [2021-07-13 20:32:03,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600455537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:03,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080477169] [2021-07-13 20:32:03,438 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:03,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:32:03,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:03,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,810 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 28 treesize of output 16 [2021-07-13 20:32:03,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,815 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 21 treesize of output 13 [2021-07-13 20:32:03,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,821 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 31 treesize of output 19 [2021-07-13 20:32:03,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,826 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 28 treesize of output 16 [2021-07-13 20:32:03,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,831 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 33 treesize of output 19 [2021-07-13 20:32:03,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,837 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 31 treesize of output 19 [2021-07-13 20:32:03,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,842 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 21 treesize of output 13 [2021-07-13 20:32:03,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,848 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 36 treesize of output 19 [2021-07-13 20:32:03,848 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,853 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 26 treesize of output 13 [2021-07-13 20:32:03,854 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,859 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 28 treesize of output 16 [2021-07-13 20:32:03,860 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,865 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 33 treesize of output 19 [2021-07-13 20:32:03,866 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,871 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 33 treesize of output 19 [2021-07-13 20:32:03,871 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,876 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 33 treesize of output 19 [2021-07-13 20:32:03,877 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,881 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 26 treesize of output 13 [2021-07-13 20:32:03,882 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:03,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:03,884 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 28 treesize of output 16 [2021-07-13 20:32:03,885 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:03,955 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:32:03,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:32:03,957 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:32:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:04,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080477169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:04,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:04,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:32:04,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090346462] [2021-07-13 20:32:04,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:32:04,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:04,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:32:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:32:04,004 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:04,802 INFO L93 Difference]: Finished difference Result 1986 states and 6507 transitions. [2021-07-13 20:32:04,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:32:04,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:32:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:04,806 INFO L225 Difference]: With dead ends: 1986 [2021-07-13 20:32:04,806 INFO L226 Difference]: Without dead ends: 1965 [2021-07-13 20:32:04,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1044.4ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:32:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-07-13 20:32:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1570. [2021-07-13 20:32:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3524537922243467) internal successors, (5260), 1569 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5260 transitions. [2021-07-13 20:32:04,828 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5260 transitions. Word has length 26 [2021-07-13 20:32:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:04,828 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5260 transitions. [2021-07-13 20:32:04,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5260 transitions. [2021-07-13 20:32:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:04,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:04,830 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:05,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-07-13 20:32:05,050 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-07-13 20:32:05,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:05,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064114520] [2021-07-13 20:32:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:05,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:05,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064114520] [2021-07-13 20:32:05,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064114520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:05,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825722731] [2021-07-13 20:32:05,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:05,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:05,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:05,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:32:05,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:05,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:05,815 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:32:05,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,826 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:32:05,826 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:32:05,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,834 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:32:05,834 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:32:05,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,852 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:32:05,853 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:32:05,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,874 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:32:05,875 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:32:05,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,888 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:32:05,888 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:32:05,889 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,909 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:32:05,909 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:32:05,910 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,919 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:32:05,919 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:32:05,920 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,936 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:32:05,936 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:32:05,937 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,956 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:32:05,956 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:32:05,960 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,968 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:32:05,968 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:32:05,969 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,978 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:32:05,978 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:32:05,978 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,987 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:32:05,987 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:32:05,988 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:06,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,002 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:32:06,004 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:06,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,018 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:32:06,019 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:06,025 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:32:06,025 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:32:06,025 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:06,133 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:32:06,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:32:06,148 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:407 [2021-07-13 20:32:06,391 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-13 20:32:06,623 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-13 20:32:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:06,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825722731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:06,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:06,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:32:06,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647750080] [2021-07-13 20:32:06,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:32:06,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:06,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:32:06,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:32:06,745 INFO L87 Difference]: Start difference. First operand 1570 states and 5260 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:07,774 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-07-13 20:32:07,942 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:32:08,459 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-07-13 20:32:08,593 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-07-13 20:32:09,197 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-07-13 20:32:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:09,262 INFO L93 Difference]: Finished difference Result 2168 states and 6948 transitions. [2021-07-13 20:32:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:32:09,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:32:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:09,266 INFO L225 Difference]: With dead ends: 2168 [2021-07-13 20:32:09,266 INFO L226 Difference]: Without dead ends: 2143 [2021-07-13 20:32:09,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3041.5ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:32:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-07-13 20:32:09,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1584. [2021-07-13 20:32:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.360707517372078) internal successors, (5320), 1583 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5320 transitions. [2021-07-13 20:32:09,289 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5320 transitions. Word has length 26 [2021-07-13 20:32:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:09,289 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5320 transitions. [2021-07-13 20:32:09,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5320 transitions. [2021-07-13 20:32:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:09,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:09,291 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:09,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-07-13 20:32:09,508 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:09,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-07-13 20:32:09,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:09,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586113297] [2021-07-13 20:32:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:09,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:09,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586113297] [2021-07-13 20:32:09,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586113297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:09,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628196706] [2021-07-13 20:32:09,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:09,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:32:09,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:09,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:32:09,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,266 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:10,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:32:10,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,275 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:10,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:32:10,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:10,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:32:10,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,298 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:10,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:32:10,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,307 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:10,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:32:10,307 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,316 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:10,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:32:10,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:10,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:32:10,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,339 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:10,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:32:10,339 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,348 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:10,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:32:10,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,357 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:10,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:32:10,358 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:10,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:32:10,373 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,384 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:10,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:32:10,385 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:10,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:32:10,397 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:10,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:32:10,411 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,419 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:10,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:32:10,420 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:10,425 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:10,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:32:10,425 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:10,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:10,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:32:10,511 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-13 20:32:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:10,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628196706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:10,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:10,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:32:10,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900898084] [2021-07-13 20:32:10,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:32:10,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:10,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:32:10,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:32:10,702 INFO L87 Difference]: Start difference. First operand 1584 states and 5320 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:11,511 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-07-13 20:32:11,975 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-13 20:32:12,204 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 20:32:12,507 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-13 20:32:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:12,561 INFO L93 Difference]: Finished difference Result 2090 states and 6847 transitions. [2021-07-13 20:32:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:32:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:32:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:12,564 INFO L225 Difference]: With dead ends: 2090 [2021-07-13 20:32:12,564 INFO L226 Difference]: Without dead ends: 2061 [2021-07-13 20:32:12,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2106.7ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:32:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-07-13 20:32:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1587. [2021-07-13 20:32:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.3612862547288778) internal successors, (5331), 1586 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5331 transitions. [2021-07-13 20:32:12,586 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5331 transitions. Word has length 26 [2021-07-13 20:32:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:12,586 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5331 transitions. [2021-07-13 20:32:12,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5331 transitions. [2021-07-13 20:32:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:12,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:12,589 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:12,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:12,805 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:12,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-07-13 20:32:12,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:12,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290697559] [2021-07-13 20:32:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:13,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290697559] [2021-07-13 20:32:13,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290697559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816561583] [2021-07-13 20:32:13,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:13,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:32:13,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:13,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:32:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:13,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:13,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:13,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:13,627 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 33 treesize of output 19 [2021-07-13 20:32:13,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:13,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:13,632 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 33 treesize of output 19 [2021-07-13 20:32:13,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:13,728 INFO L628 ElimStorePlain]: treesize reduction 121, result has 46.0 percent of original size [2021-07-13 20:32:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:13,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:32:13,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:13,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:13,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:13,769 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 21 treesize of output 13 [2021-07-13 20:32:13,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:13,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:13,803 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-07-13 20:32:13,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:32:13,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-07-13 20:32:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:13,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816561583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:13,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:13,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:32:13,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281208282] [2021-07-13 20:32:13,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:32:13,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:32:13,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:32:13,859 INFO L87 Difference]: Start difference. First operand 1587 states and 5331 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:14,108 INFO L93 Difference]: Finished difference Result 1662 states and 5522 transitions. [2021-07-13 20:32:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:32:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:32:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:14,112 INFO L225 Difference]: With dead ends: 1662 [2021-07-13 20:32:14,112 INFO L226 Difference]: Without dead ends: 1647 [2021-07-13 20:32:14,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 718.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:32:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-13 20:32:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1593. [2021-07-13 20:32:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.363065326633166) internal successors, (5354), 1592 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5354 transitions. [2021-07-13 20:32:14,132 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5354 transitions. Word has length 26 [2021-07-13 20:32:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:14,132 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5354 transitions. [2021-07-13 20:32:14,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5354 transitions. [2021-07-13 20:32:14,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:14,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:14,134 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:14,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:14,351 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:14,351 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-07-13 20:32:14,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:14,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513538567] [2021-07-13 20:32:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:14,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:14,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513538567] [2021-07-13 20:32:14,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513538567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:14,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432481928] [2021-07-13 20:32:14,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:14,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:32:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:14,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:32:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:15,029 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_115, v_prenex_117], 3=[A, v_prenex_119]} [2021-07-13 20:32:15,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:32:15,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:32:15,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,208 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:32:15,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,221 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:15,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:32:15,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:32:15,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,348 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:32:15,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,361 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:32:15,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 20:32:15,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:32:15,376 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,484 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-13 20:32:15,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:32:15,500 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:15,509 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:32:15,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-13 20:32:15,511 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:32:15,614 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:194 [2021-07-13 20:32:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:15,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432481928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:15,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:15,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:32:15,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169773564] [2021-07-13 20:32:15,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:32:15,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:15,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:32:15,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:32:15,798 INFO L87 Difference]: Start difference. First operand 1593 states and 5354 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:16,887 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-07-13 20:32:16,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:16,945 INFO L93 Difference]: Finished difference Result 2262 states and 7355 transitions. [2021-07-13 20:32:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:32:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:32:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:16,948 INFO L225 Difference]: With dead ends: 2262 [2021-07-13 20:32:16,949 INFO L226 Difference]: Without dead ends: 2212 [2021-07-13 20:32:16,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1430.1ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-07-13 20:32:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1600. [2021-07-13 20:32:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.367104440275172) internal successors, (5384), 1599 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5384 transitions. [2021-07-13 20:32:17,001 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5384 transitions. Word has length 26 [2021-07-13 20:32:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:17,001 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5384 transitions. [2021-07-13 20:32:17,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5384 transitions. [2021-07-13 20:32:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:17,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:17,003 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:17,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-07-13 20:32:17,219 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-07-13 20:32:17,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:17,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888803698] [2021-07-13 20:32:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:17,403 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-07-13 20:32:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:17,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:17,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888803698] [2021-07-13 20:32:17,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888803698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:17,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990325086] [2021-07-13 20:32:17,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:17,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:32:17,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:32:17,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:18,011 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:32:18,203 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:32:18,270 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_129], 2=[A, v_prenex_128]} [2021-07-13 20:32:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:18,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:32:18,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:18,380 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:32:18,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:18,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:18,384 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 28 treesize of output 16 [2021-07-13 20:32:18,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:18,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:18,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:18,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:18,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:18,427 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 21 treesize of output 13 [2021-07-13 20:32:18,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:18,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:18,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:18,430 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 28 treesize of output 16 [2021-07-13 20:32:18,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:18,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:18,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:32:18,462 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:32:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:18,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990325086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:18,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:18,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:32:18,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346498573] [2021-07-13 20:32:18,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:32:18,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:32:18,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:32:18,537 INFO L87 Difference]: Start difference. First operand 1600 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:19,271 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:32:19,628 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-07-13 20:32:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:19,733 INFO L93 Difference]: Finished difference Result 1991 states and 6587 transitions. [2021-07-13 20:32:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:32:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:32:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:19,738 INFO L225 Difference]: With dead ends: 1991 [2021-07-13 20:32:19,738 INFO L226 Difference]: Without dead ends: 1976 [2021-07-13 20:32:19,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1751.2ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:32:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-07-13 20:32:19,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1611. [2021-07-13 20:32:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.3670807453416147) internal successors, (5421), 1610 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5421 transitions. [2021-07-13 20:32:19,766 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5421 transitions. Word has length 26 [2021-07-13 20:32:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:19,766 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5421 transitions. [2021-07-13 20:32:19,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5421 transitions. [2021-07-13 20:32:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:19,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:19,769 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:19,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-07-13 20:32:19,985 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:19,986 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 25 times [2021-07-13 20:32:19,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:19,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106857711] [2021-07-13 20:32:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:20,289 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-13 20:32:20,423 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-07-13 20:32:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:20,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:20,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106857711] [2021-07-13 20:32:20,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106857711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:20,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565992770] [2021-07-13 20:32:20,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:32:20,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:20,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:20,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:32:20,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:20,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:32:20,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:32:20,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,862 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:20,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:32:20,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:20,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-13 20:32:20,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,884 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:20,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:32:20,884 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,892 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:20,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:32:20,893 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:20,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-13 20:32:20,937 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:20,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:32:20,949 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:20,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-13 20:32:20,964 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,974 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:20,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:32:20,975 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,985 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:20,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:32:20,985 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,997 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:20,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:32:20,998 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:21,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:21,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:21,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:21,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:21,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:32:21,007 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:21,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:21,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:21,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:32:21,018 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:21,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:21,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:21,025 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:21,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-13 20:32:21,026 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:21,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:21,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:32:21,076 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-13 20:32:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:21,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565992770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:21,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:21,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:32:21,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979982957] [2021-07-13 20:32:21,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:32:21,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:21,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:32:21,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:32:21,236 INFO L87 Difference]: Start difference. First operand 1611 states and 5421 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:21,823 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:32:22,004 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-07-13 20:32:22,437 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-13 20:32:22,589 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-07-13 20:32:22,777 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 20:32:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:22,875 INFO L93 Difference]: Finished difference Result 2102 states and 6930 transitions. [2021-07-13 20:32:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:32:22,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:32:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:22,879 INFO L225 Difference]: With dead ends: 2102 [2021-07-13 20:32:22,879 INFO L226 Difference]: Without dead ends: 2083 [2021-07-13 20:32:22,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1965.7ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-07-13 20:32:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1612. [2021-07-13 20:32:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 3.3699565487274983) internal successors, (5429), 1611 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5429 transitions. [2021-07-13 20:32:22,902 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5429 transitions. Word has length 26 [2021-07-13 20:32:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:22,902 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 5429 transitions. [2021-07-13 20:32:22,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5429 transitions. [2021-07-13 20:32:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:22,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:22,904 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:23,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:23,121 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:23,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 26 times [2021-07-13 20:32:23,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:23,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9221826] [2021-07-13 20:32:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:23,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9221826] [2021-07-13 20:32:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9221826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312282365] [2021-07-13 20:32:23,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:23,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:23,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:23,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:32:23,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:23,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,670 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:23,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:32:23,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,679 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:23,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:32:23,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,691 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:23,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:32:23,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,701 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:23,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:32:23,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,713 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:23,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:32:23,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:32:23,727 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,736 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:23,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:32:23,736 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:32:23,749 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:32:23,763 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,771 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:23,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:32:23,772 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,780 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:23,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:32:23,781 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:32:23,794 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,806 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:32:23,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:32:23,807 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:32:23,823 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,830 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:23,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:32:23,831 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,836 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:32:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:32:23,837 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:32:23,931 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:32:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:24,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312282365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:24,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:24,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:32:24,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207747744] [2021-07-13 20:32:24,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:32:24,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:24,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:32:24,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:32:24,122 INFO L87 Difference]: Start difference. First operand 1612 states and 5429 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:24,658 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:32:25,298 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 20:32:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:25,352 INFO L93 Difference]: Finished difference Result 2116 states and 6975 transitions. [2021-07-13 20:32:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:32:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:32:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:25,356 INFO L225 Difference]: With dead ends: 2116 [2021-07-13 20:32:25,356 INFO L226 Difference]: Without dead ends: 2091 [2021-07-13 20:32:25,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1448.1ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:32:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-07-13 20:32:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1618. [2021-07-13 20:32:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.368583797155226) internal successors, (5447), 1617 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5447 transitions. [2021-07-13 20:32:25,379 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5447 transitions. Word has length 26 [2021-07-13 20:32:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:25,379 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5447 transitions. [2021-07-13 20:32:25,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5447 transitions. [2021-07-13 20:32:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:25,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:25,381 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:25,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-07-13 20:32:25,597 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-07-13 20:32:25,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:25,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868993816] [2021-07-13 20:32:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:26,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:26,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868993816] [2021-07-13 20:32:26,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868993816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:26,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043711095] [2021-07-13 20:32:26,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:26,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:32:26,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:26,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:32:26,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:26,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:32:26,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:32:26,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:32:26,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:32:26,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:32:26,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-13 20:32:26,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:32:26,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:32:26,640 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:32:26,648 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-13 20:32:26,657 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:32:26,667 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:32:26,686 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-13 20:32:26,695 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-13 20:32:26,703 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:32:26,711 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:26,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:26,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:32:26,716 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:26,750 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-13 20:32:26,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:26,752 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-13 20:32:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:26,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043711095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:26,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:26,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:32:26,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866581295] [2021-07-13 20:32:26,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:32:26,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:26,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:32:26,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:32:26,780 INFO L87 Difference]: Start difference. First operand 1618 states and 5447 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:28,303 INFO L93 Difference]: Finished difference Result 2097 states and 6880 transitions. [2021-07-13 20:32:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:32:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:32:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:28,307 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:32:28,307 INFO L226 Difference]: Without dead ends: 2071 [2021-07-13 20:32:28,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1812.2ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:32:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-07-13 20:32:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1622. [2021-07-13 20:32:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-07-13 20:32:28,329 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-07-13 20:32:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:28,329 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-07-13 20:32:28,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-07-13 20:32:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:28,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:28,331 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:28,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1205 [2021-07-13 20:32:28,548 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-07-13 20:32:28,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:28,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139596227] [2021-07-13 20:32:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:29,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:29,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139596227] [2021-07-13 20:32:29,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139596227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:29,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261438709] [2021-07-13 20:32:29,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:29,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:32:29,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:29,367 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-13 20:32:29,415 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_132, v_prenex_134], 6=[A, v_prenex_130]} [2021-07-13 20:32:29,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:29,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:29,422 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 32 treesize of output 16 [2021-07-13 20:32:29,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:29,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:29,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:29,428 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 25 treesize of output 13 [2021-07-13 20:32:29,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:29,534 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-07-13 20:32:29,535 INFO L628 ElimStorePlain]: treesize reduction 180, result has 40.2 percent of original size [2021-07-13 20:32:29,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:29,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:32:29,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:29,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:29,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:29,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:29,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:29,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:32:29,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:29,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:29,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:29,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:29,611 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 29 treesize of output 13 [2021-07-13 20:32:29,612 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:29,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:29,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:32:29,639 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:43 [2021-07-13 20:32:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:29,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261438709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:29,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:29,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:32:29,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173955410] [2021-07-13 20:32:29,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:32:29,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:32:29,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:32:29,686 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:31,231 INFO L93 Difference]: Finished difference Result 2270 states and 7447 transitions. [2021-07-13 20:32:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:32:31,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-07-13 20:32:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:31,235 INFO L225 Difference]: With dead ends: 2270 [2021-07-13 20:32:31,235 INFO L226 Difference]: Without dead ends: 2255 [2021-07-13 20:32:31,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1909.4ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:32:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-07-13 20:32:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1622. [2021-07-13 20:32:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-07-13 20:32:31,258 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-07-13 20:32:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:31,258 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-07-13 20:32:31,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-07-13 20:32:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:31,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:31,260 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:31,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:31,477 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 27 times [2021-07-13 20:32:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:31,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675905073] [2021-07-13 20:32:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:31,685 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-07-13 20:32:31,798 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 20:32:31,922 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-07-13 20:32:32,060 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-13 20:32:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:32,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:32,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675905073] [2021-07-13 20:32:32,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675905073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:32,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951890889] [2021-07-13 20:32:32,187 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:32,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:32:32,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:32,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:32:32,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:32,551 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:32:32,802 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:32:33,095 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-07-13 20:32:33,155 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_143, v_prenex_145], 6=[A, v_prenex_147]} [2021-07-13 20:32:33,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:33,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:33,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:33,162 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 33 treesize of output 19 [2021-07-13 20:32:33,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:33,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:33,167 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 28 treesize of output 16 [2021-07-13 20:32:33,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:33,324 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-13 20:32:33,325 INFO L628 ElimStorePlain]: treesize reduction 147, result has 51.5 percent of original size [2021-07-13 20:32:33,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:33,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:33,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:33,331 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 28 treesize of output 16 [2021-07-13 20:32:33,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:33,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:33,336 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 21 treesize of output 13 [2021-07-13 20:32:33,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:33,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:33,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:33,389 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 21 treesize of output 13 [2021-07-13 20:32:33,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:33,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:33,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:33,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:32:33,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:33,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:33,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:32:33,486 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:341, output treesize:61 [2021-07-13 20:32:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:33,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951890889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:33,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:33,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:32:33,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073667803] [2021-07-13 20:32:33,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:32:33,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:33,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:32:33,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:32:33,561 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:33,960 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 20:32:34,254 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-07-13 20:32:34,414 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-07-13 20:32:34,859 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 69 [2021-07-13 20:32:35,453 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-07-13 20:32:35,923 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 89 [2021-07-13 20:32:36,597 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 87 [2021-07-13 20:32:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:36,700 INFO L93 Difference]: Finished difference Result 2122 states and 6912 transitions. [2021-07-13 20:32:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:32:36,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:32:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:36,703 INFO L225 Difference]: With dead ends: 2122 [2021-07-13 20:32:36,704 INFO L226 Difference]: Without dead ends: 2107 [2021-07-13 20:32:36,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4150.3ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:32:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-07-13 20:32:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1633. [2021-07-13 20:32:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.3670343137254903) internal successors, (5495), 1632 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5495 transitions. [2021-07-13 20:32:36,730 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5495 transitions. Word has length 26 [2021-07-13 20:32:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:36,730 INFO L482 AbstractCegarLoop]: Abstraction has 1633 states and 5495 transitions. [2021-07-13 20:32:36,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5495 transitions. [2021-07-13 20:32:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:36,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:36,732 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:36,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-07-13 20:32:36,949 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:36,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-07-13 20:32:36,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:36,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127388273] [2021-07-13 20:32:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:37,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:37,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127388273] [2021-07-13 20:32:37,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127388273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:37,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879352966] [2021-07-13 20:32:37,461 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:37,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:37,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:37,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:32:37,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:37,908 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-07-13 20:32:38,261 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_158], 6=[v_prenex_160, v_prenex_162]} [2021-07-13 20:32:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,285 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:32:38,285 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-13 20:32:38,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:38,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,310 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:32:38,310 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:32:38,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:38,487 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-13 20:32:38,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,508 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:32:38,508 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:32:38,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:38,524 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-13 20:32:38,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:38,696 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:32:38,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:38,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:38,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:38,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:32:38,724 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:38,743 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:32:38,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:32:38,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:38,891 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:32:38,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:38,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:38,916 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:32:38,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:32:38,917 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:38,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:38,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:38,935 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:32:38,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:32:38,937 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:39,064 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-13 20:32:39,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:39,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:32:39,080 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:433, output treesize:343 [2021-07-13 20:32:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879352966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:39,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:39,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:32:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870043746] [2021-07-13 20:32:39,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:32:39,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:39,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:32:39,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:32:39,235 INFO L87 Difference]: Start difference. First operand 1633 states and 5495 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:39,881 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-07-13 20:32:41,380 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-13 20:32:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:41,941 INFO L93 Difference]: Finished difference Result 2550 states and 8113 transitions. [2021-07-13 20:32:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:32:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:32:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:41,947 INFO L225 Difference]: With dead ends: 2550 [2021-07-13 20:32:41,947 INFO L226 Difference]: Without dead ends: 2506 [2021-07-13 20:32:41,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3069.0ms TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:32:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-07-13 20:32:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1640. [2021-07-13 20:32:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.36790726052471) internal successors, (5520), 1639 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5520 transitions. [2021-07-13 20:32:41,980 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5520 transitions. Word has length 26 [2021-07-13 20:32:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:41,980 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5520 transitions. [2021-07-13 20:32:41,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5520 transitions. [2021-07-13 20:32:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:41,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:41,984 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:42,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:42,197 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-07-13 20:32:42,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:42,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137999490] [2021-07-13 20:32:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:42,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:42,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137999490] [2021-07-13 20:32:42,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137999490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:42,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692173031] [2021-07-13 20:32:42,653 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:42,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:32:42,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:42,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:32:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:43,002 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:32:43,206 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:32:43,520 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:32:43,874 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:32:43,874 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 33 treesize of output 59 [2021-07-13 20:32:43,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:43,928 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-07-13 20:32:43,928 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 33 treesize of output 38 [2021-07-13 20:32:43,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:44,983 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 175 DAG size of output: 169 [2021-07-13 20:32:44,983 INFO L628 ElimStorePlain]: treesize reduction 23, result has 97.5 percent of original size [2021-07-13 20:32:45,054 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-13 20:32:45,054 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 33 treesize of output 51 [2021-07-13 20:32:45,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:45,107 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-07-13 20:32:45,108 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 28 treesize of output 44 [2021-07-13 20:32:45,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:45,619 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-13 20:32:45,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:45,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:45,671 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 35 treesize of output 67 [2021-07-13 20:32:45,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:45,747 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-07-13 20:32:45,747 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 35 treesize of output 43 [2021-07-13 20:32:45,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:47,338 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 185 DAG size of output: 168 [2021-07-13 20:32:47,339 INFO L628 ElimStorePlain]: treesize reduction 92, result has 90.6 percent of original size [2021-07-13 20:32:47,406 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:32:47,406 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 35 treesize of output 59 [2021-07-13 20:32:47,416 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:47,479 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-07-13 20:32:47,479 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 35 treesize of output 63 [2021-07-13 20:32:47,492 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:48,538 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 181 DAG size of output: 172 [2021-07-13 20:32:48,539 INFO L628 ElimStorePlain]: treesize reduction 83, result has 91.5 percent of original size [2021-07-13 20:32:48,601 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-13 20:32:48,601 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 26 treesize of output 52 [2021-07-13 20:32:48,609 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:48,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:48,648 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 21 treesize of output 61 [2021-07-13 20:32:48,704 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:49,186 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-07-13 20:32:49,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:49,250 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:32:49,250 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 33 treesize of output 59 [2021-07-13 20:32:49,259 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:49,313 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:32:49,313 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 28 treesize of output 56 [2021-07-13 20:32:49,336 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:50,282 WARN L205 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 152 [2021-07-13 20:32:50,282 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.8 percent of original size [2021-07-13 20:32:50,342 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-13 20:32:50,342 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 26 treesize of output 52 [2021-07-13 20:32:50,350 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:50,404 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-13 20:32:50,404 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 31 treesize of output 51 [2021-07-13 20:32:50,408 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:50,886 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-13 20:32:50,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:50,936 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-07-13 20:32:50,936 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 28 treesize of output 44 [2021-07-13 20:32:50,939 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:50,993 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-13 20:32:50,993 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 28 treesize of output 56 [2021-07-13 20:32:51,011 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:51,854 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2021-07-13 20:32:51,855 INFO L628 ElimStorePlain]: treesize reduction 68, result has 91.9 percent of original size [2021-07-13 20:32:51,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-13 20:32:51,976 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:913, output treesize:2294 [2021-07-13 20:32:52,761 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 69 [2021-07-13 20:32:52,933 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-13 20:32:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:52,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692173031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:52,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:52,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 20:32:52,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319409846] [2021-07-13 20:32:52,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:32:52,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:52,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:32:52,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:32:52,968 INFO L87 Difference]: Start difference. First operand 1640 states and 5520 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) [2021-07-13 20:32:55,442 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-13 20:32:55,826 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-13 20:32:56,556 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 89 [2021-07-13 20:32:56,949 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-07-13 20:32:57,296 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-07-13 20:32:57,458 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 33 [2021-07-13 20:32:58,078 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 90 [2021-07-13 20:32:58,567 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 92 [2021-07-13 20:32:59,499 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 96 [2021-07-13 20:32:59,881 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-07-13 20:33:00,111 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-07-13 20:33:00,256 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2021-07-13 20:33:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:00,383 INFO L93 Difference]: Finished difference Result 3086 states and 9767 transitions. [2021-07-13 20:33:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:33:00,384 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 26 [2021-07-13 20:33:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:00,389 INFO L225 Difference]: With dead ends: 3086 [2021-07-13 20:33:00,390 INFO L226 Difference]: Without dead ends: 3056 [2021-07-13 20:33:00,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 8005.8ms TimeCoverageRelationStatistics Valid=696, Invalid=4134, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:33:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-07-13 20:33:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1671. [2021-07-13 20:33:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.3748502994011975) internal successors, (5636), 1670 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5636 transitions. [2021-07-13 20:33:00,420 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5636 transitions. Word has length 26 [2021-07-13 20:33:00,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:00,420 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5636 transitions. [2021-07-13 20:33:00,420 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) [2021-07-13 20:33:00,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5636 transitions. [2021-07-13 20:33:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:00,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:00,422 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:00,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:00,637 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:00,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 28 times [2021-07-13 20:33:00,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:00,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287032981] [2021-07-13 20:33:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:00,836 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-13 20:33:01,130 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-07-13 20:33:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:01,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287032981] [2021-07-13 20:33:01,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287032981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:01,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208204406] [2021-07-13 20:33:01,253 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:01,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:33:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:01,598 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:33:01,853 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:33:01,914 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_185], 2=[v_prenex_186, v_prenex_187], 3=[A]} [2021-07-13 20:33:01,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:01,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:33:01,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:02,021 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-13 20:33:02,021 INFO L628 ElimStorePlain]: treesize reduction 94, result has 60.3 percent of original size [2021-07-13 20:33:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:02,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:02,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:02,026 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 28 treesize of output 16 [2021-07-13 20:33:02,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:02,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:02,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:02,030 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 21 treesize of output 13 [2021-07-13 20:33:02,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:02,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:02,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:02,072 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 28 treesize of output 16 [2021-07-13 20:33:02,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:02,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:02,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:02,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:33:02,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:02,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:02,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:33:02,141 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:251, output treesize:56 [2021-07-13 20:33:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:02,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208204406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:02,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:02,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:33:02,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526624404] [2021-07-13 20:33:02,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:02,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:02,191 INFO L87 Difference]: Start difference. First operand 1671 states and 5636 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:02,704 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-13 20:33:03,391 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 20:33:03,514 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-13 20:33:03,722 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-07-13 20:33:03,962 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-07-13 20:33:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:04,081 INFO L93 Difference]: Finished difference Result 2244 states and 7296 transitions. [2021-07-13 20:33:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:33:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:33:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:04,084 INFO L225 Difference]: With dead ends: 2244 [2021-07-13 20:33:04,084 INFO L226 Difference]: Without dead ends: 2229 [2021-07-13 20:33:04,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2503.1ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:33:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-07-13 20:33:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1676. [2021-07-13 20:33:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.3761194029850747) internal successors, (5655), 1675 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5655 transitions. [2021-07-13 20:33:04,107 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5655 transitions. Word has length 26 [2021-07-13 20:33:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:04,107 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5655 transitions. [2021-07-13 20:33:04,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:04,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5655 transitions. [2021-07-13 20:33:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:04,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:04,110 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:04,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:04,323 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:04,323 INFO L82 PathProgramCache]: Analyzing trace with hash 318878074, now seen corresponding path program 29 times [2021-07-13 20:33:04,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:04,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877164106] [2021-07-13 20:33:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:04,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:04,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877164106] [2021-07-13 20:33:04,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877164106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:04,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633349303] [2021-07-13 20:33:04,686 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:04,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:04,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:04,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:33:04,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:05,095 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:33:05,292 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:33:05,341 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_195, v_prenex_197, v_prenex_199, v_prenex_200, v_prenex_201], 3=[v_prenex_196, v_prenex_198]} [2021-07-13 20:33:05,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:05,356 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:05,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:33:05,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:05,491 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:33:05,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:05,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:05,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:33:05,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:05,633 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:33:05,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:05,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:05,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:05,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:33:05,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:05,762 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:33:05,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:05,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:05,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:05,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:33:05,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:05,893 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:33:05,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:05,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:05,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:05,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:33:05,906 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:06,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:06,016 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:06,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:33:06,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:06,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:06,128 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:33:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:33:06,129 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:06,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:06,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:06,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:06,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:33:06,231 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:06,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:06,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:33:06,327 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-07-13 20:33:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:06,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633349303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:06,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:06,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:33:06,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752094990] [2021-07-13 20:33:06,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:33:06,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:06,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:33:06,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:33:06,521 INFO L87 Difference]: Start difference. First operand 1676 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:06,816 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-13 20:33:07,744 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-13 20:33:08,230 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2021-07-13 20:33:08,635 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-07-13 20:33:09,027 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-07-13 20:33:09,481 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 110 [2021-07-13 20:33:09,927 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-07-13 20:33:10,146 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 20:33:10,433 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-07-13 20:33:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:10,570 INFO L93 Difference]: Finished difference Result 2686 states and 8637 transitions. [2021-07-13 20:33:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:33:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:33:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:10,576 INFO L225 Difference]: With dead ends: 2686 [2021-07-13 20:33:10,576 INFO L226 Difference]: Without dead ends: 2652 [2021-07-13 20:33:10,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 4247.1ms TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:33:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-07-13 20:33:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1683. [2021-07-13 20:33:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.381688466111772) internal successors, (5688), 1682 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5688 transitions. [2021-07-13 20:33:10,614 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5688 transitions. Word has length 26 [2021-07-13 20:33:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:10,614 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5688 transitions. [2021-07-13 20:33:10,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5688 transitions. [2021-07-13 20:33:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:10,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:10,617 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:10,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-07-13 20:33:10,833 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:10,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-07-13 20:33:10,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:10,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824561920] [2021-07-13 20:33:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:11,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:11,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824561920] [2021-07-13 20:33:11,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824561920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:11,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450733462] [2021-07-13 20:33:11,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:11,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:11,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:11,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:33:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:33:11,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:33:11,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:33:11,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-13 20:33:11,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-13 20:33:11,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:33:11,797 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:33:11,806 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:33:11,814 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:33:11,823 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:33:11,831 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:33:11,840 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:33:11,848 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-13 20:33:11,857 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:33:11,867 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-13 20:33:11,876 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:11,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:11,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:33:11,881 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,940 INFO L628 ElimStorePlain]: treesize reduction 237, result has 13.5 percent of original size [2021-07-13 20:33:11,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:11,941 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-07-13 20:33:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:11,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450733462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:11,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:11,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:33:11,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832150705] [2021-07-13 20:33:11,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:33:11,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:11,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:33:11,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:33:11,975 INFO L87 Difference]: Start difference. First operand 1683 states and 5688 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:12,640 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-07-13 20:33:13,321 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-07-13 20:33:13,950 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-13 20:33:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:14,594 INFO L93 Difference]: Finished difference Result 3384 states and 10825 transitions. [2021-07-13 20:33:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:33:14,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:33:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:14,602 INFO L225 Difference]: With dead ends: 3384 [2021-07-13 20:33:14,602 INFO L226 Difference]: Without dead ends: 3348 [2021-07-13 20:33:14,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2620.7ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:33:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-07-13 20:33:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 1796. [2021-07-13 20:33:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 3.403899721448468) internal successors, (6110), 1795 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6110 transitions. [2021-07-13 20:33:14,647 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6110 transitions. Word has length 26 [2021-07-13 20:33:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:14,647 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 6110 transitions. [2021-07-13 20:33:14,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6110 transitions. [2021-07-13 20:33:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:14,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:14,651 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:14,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:14,865 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-07-13 20:33:14,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:14,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122500613] [2021-07-13 20:33:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:15,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:15,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122500613] [2021-07-13 20:33:15,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122500613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:15,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151643927] [2021-07-13 20:33:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:15,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:15,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:15,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:33:15,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,717 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:33:15,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 37 [2021-07-13 20:33:15,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,751 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-13 20:33:15,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-07-13 20:33:15,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,779 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:33:15,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-13 20:33:15,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,807 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-13 20:33:15,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:33:15,808 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,832 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:33:15,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-13 20:33:15,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,850 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:33:15,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:33:15,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,875 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:33:15,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-07-13 20:33:15,877 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,894 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:33:15,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:33:15,894 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,911 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:33:15,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:33:15,911 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,928 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:33:15,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:33:15,928 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,952 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-13 20:33:15,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-13 20:33:15,953 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,968 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:33:15,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-07-13 20:33:15,968 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,983 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:33:15,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:33:15,983 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:15,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:15,998 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:33:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:33:15,999 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:16,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:16,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-13 20:33:16,027 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:16,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:16,036 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:33:16,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:33:16,037 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:16,194 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-07-13 20:33:16,194 INFO L628 ElimStorePlain]: treesize reduction 116, result has 51.7 percent of original size [2021-07-13 20:33:16,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:33:16,196 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-13 20:33:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:16,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151643927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:16,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:16,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:33:16,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485274204] [2021-07-13 20:33:16,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:33:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:33:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:33:16,326 INFO L87 Difference]: Start difference. First operand 1796 states and 6110 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:17,596 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-07-13 20:33:18,084 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-13 20:33:18,318 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-13 20:33:18,536 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-13 20:33:19,035 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-07-13 20:33:19,287 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-13 20:33:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:19,573 INFO L93 Difference]: Finished difference Result 3832 states and 12118 transitions. [2021-07-13 20:33:19,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:33:19,574 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:33:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:19,581 INFO L225 Difference]: With dead ends: 3832 [2021-07-13 20:33:19,581 INFO L226 Difference]: Without dead ends: 3775 [2021-07-13 20:33:19,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3143.0ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:33:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-07-13 20:33:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 1819. [2021-07-13 20:33:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.407590759075908) internal successors, (6195), 1818 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6195 transitions. [2021-07-13 20:33:19,615 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6195 transitions. Word has length 26 [2021-07-13 20:33:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:19,615 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 6195 transitions. [2021-07-13 20:33:19,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6195 transitions. [2021-07-13 20:33:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:19,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:19,617 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:19,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-07-13 20:33:19,833 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 30 times [2021-07-13 20:33:19,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:19,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336724931] [2021-07-13 20:33:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:20,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:20,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336724931] [2021-07-13 20:33:20,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336724931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:20,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273370262] [2021-07-13 20:33:20,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:20,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:20,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:33:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:20,776 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:33:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:21,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:21,266 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:33:21,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:21,415 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-13 20:33:21,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:21,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:21,437 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:33:21,437 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:33:21,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:21,575 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-13 20:33:21,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:21,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:21,598 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:33:21,598 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:33:21,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:21,738 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-13 20:33:21,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:21,762 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:33:21,762 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:33:21,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:21,907 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-13 20:33:21,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:21,934 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:33:21,935 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:33:21,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:22,099 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:33:22,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:22,118 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:33:22,118 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:33:22,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:22,248 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:33:22,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:22,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:22,265 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:33:22,266 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:22,427 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:33:22,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:22,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:22,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:22,443 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:33:22,447 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:22,564 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:33:22,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:22,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:33:22,584 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:373, output treesize:497 [2021-07-13 20:33:22,854 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-13 20:33:23,084 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-13 20:33:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:23,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273370262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:23,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:23,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:33:23,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952187714] [2021-07-13 20:33:23,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:33:23,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:23,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:33:23,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:33:23,210 INFO L87 Difference]: Start difference. First operand 1819 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:23,495 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-07-13 20:33:24,213 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-13 20:33:24,387 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-07-13 20:33:24,715 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-07-13 20:33:25,034 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-13 20:33:25,596 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-07-13 20:33:26,080 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-07-13 20:33:26,475 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-07-13 20:33:26,751 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-07-13 20:33:27,294 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2021-07-13 20:33:27,530 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:33:27,767 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-13 20:33:28,263 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-07-13 20:33:28,908 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2021-07-13 20:33:29,349 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2021-07-13 20:33:30,219 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 140 [2021-07-13 20:33:30,598 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2021-07-13 20:33:31,003 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-07-13 20:33:31,396 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-07-13 20:33:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:31,460 INFO L93 Difference]: Finished difference Result 2671 states and 8693 transitions. [2021-07-13 20:33:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:33:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:33:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:31,465 INFO L225 Difference]: With dead ends: 2671 [2021-07-13 20:33:31,465 INFO L226 Difference]: Without dead ends: 2637 [2021-07-13 20:33:31,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 8642.0ms TimeCoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:33:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-07-13 20:33:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1837. [2021-07-13 20:33:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.411764705882353) internal successors, (6264), 1836 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6264 transitions. [2021-07-13 20:33:31,493 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6264 transitions. Word has length 26 [2021-07-13 20:33:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:31,493 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6264 transitions. [2021-07-13 20:33:31,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6264 transitions. [2021-07-13 20:33:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:31,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:31,496 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:31,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-07-13 20:33:31,712 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:31,712 INFO L82 PathProgramCache]: Analyzing trace with hash 461518918, now seen corresponding path program 31 times [2021-07-13 20:33:31,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:31,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999292246] [2021-07-13 20:33:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:32,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:32,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999292246] [2021-07-13 20:33:32,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999292246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:32,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140457792] [2021-07-13 20:33:32,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:32,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:33:32,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,299 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:32,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:33:32,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:32,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-13 20:33:32,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:32,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-13 20:33:32,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,340 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:32,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-13 20:33:32,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,355 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:32,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-13 20:33:32,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,366 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:32,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-13 20:33:32,367 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,377 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:32,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-13 20:33:32,378 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,388 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:32,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-07-13 20:33:32,388 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,398 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:32,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-13 20:33:32,398 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,408 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-13 20:33:32,409 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,418 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:32,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-07-13 20:33:32,419 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:32,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-13 20:33:32,434 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:32,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:33:32,447 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,458 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:32,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-13 20:33:32,459 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:32,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-13 20:33:32,473 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:32,479 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:32,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-13 20:33:32,479 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:32,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:32,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:33:32,553 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-07-13 20:33:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140457792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:32,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:32,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:33:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969352064] [2021-07-13 20:33:32,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:33:32,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:32,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:33:32,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:33:32,786 INFO L87 Difference]: Start difference. First operand 1837 states and 6264 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:33,598 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-13 20:33:34,437 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 20:33:34,804 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-13 20:33:35,026 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-07-13 20:33:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:35,168 INFO L93 Difference]: Finished difference Result 2618 states and 8665 transitions. [2021-07-13 20:33:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:33:35,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:33:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:35,174 INFO L225 Difference]: With dead ends: 2618 [2021-07-13 20:33:35,174 INFO L226 Difference]: Without dead ends: 2584 [2021-07-13 20:33:35,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2420.5ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:33:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-07-13 20:33:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1832. [2021-07-13 20:33:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.409612233752048) internal successors, (6243), 1831 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6243 transitions. [2021-07-13 20:33:35,212 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6243 transitions. Word has length 26 [2021-07-13 20:33:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:35,212 INFO L482 AbstractCegarLoop]: Abstraction has 1832 states and 6243 transitions. [2021-07-13 20:33:35,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6243 transitions. [2021-07-13 20:33:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:35,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:35,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:35,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:35,429 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 32 times [2021-07-13 20:33:35,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:35,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298486272] [2021-07-13 20:33:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:35,637 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-13 20:33:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:35,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:35,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298486272] [2021-07-13 20:33:35,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298486272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:35,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259598499] [2021-07-13 20:33:35,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:35,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:35,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:33:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:36,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,309 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:33:36,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,331 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:33:36,331 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:33:36,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,467 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:33:36,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,484 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:33:36,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,501 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:33:36,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,655 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:33:36,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,673 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:33:36,673 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:33:36,674 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,690 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:33:36,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:33:36,694 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,818 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:33:36,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,839 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:33:36,840 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:33:36,841 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,856 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:33:36,856 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:33:36,857 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,981 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-13 20:33:36,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:33:36,996 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:430 [2021-07-13 20:33:37,253 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-13 20:33:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:37,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259598499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:37,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:37,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:33:37,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316136801] [2021-07-13 20:33:37,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:33:37,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:33:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:33:37,508 INFO L87 Difference]: Start difference. First operand 1832 states and 6243 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:38,437 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-13 20:33:38,992 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-07-13 20:33:39,303 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-13 20:33:39,553 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-07-13 20:33:39,912 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 20:33:40,242 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-07-13 20:33:40,505 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 20:33:40,772 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-07-13 20:33:41,082 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-07-13 20:33:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:41,437 INFO L93 Difference]: Finished difference Result 2647 states and 8625 transitions. [2021-07-13 20:33:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:33:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:33:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:41,442 INFO L225 Difference]: With dead ends: 2647 [2021-07-13 20:33:41,442 INFO L226 Difference]: Without dead ends: 2578 [2021-07-13 20:33:41,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4185.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:33:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-07-13 20:33:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1826. [2021-07-13 20:33:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.4076712328767123) internal successors, (6219), 1825 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) [2021-07-13 20:33:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6219 transitions. [2021-07-13 20:33:41,478 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6219 transitions. Word has length 26 [2021-07-13 20:33:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:41,478 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6219 transitions. [2021-07-13 20:33:41,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6219 transitions. [2021-07-13 20:33:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:41,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:41,482 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:41,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1963,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:41,697 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-07-13 20:33:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:41,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528273458] [2021-07-13 20:33:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:42,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528273458] [2021-07-13 20:33:42,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528273458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:42,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761734522] [2021-07-13 20:33:42,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:42,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:33:42,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:33:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:33:42,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:33:42,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:33:42,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:33:42,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:33:42,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:33:42,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:33:42,824 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:33:42,830 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:33:42,837 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-07-13 20:33:42,845 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:33:42,852 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:33:42,859 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:33:42,865 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:33:42,873 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:33:42,879 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:33:42,883 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,919 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-07-13 20:33:42,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:42,921 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:21 [2021-07-13 20:33:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:42,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761734522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:42,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:42,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:33:42,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610784632] [2021-07-13 20:33:42,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:42,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:42,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:42,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:42,955 INFO L87 Difference]: Start difference. First operand 1826 states and 6219 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:43,498 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-07-13 20:33:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:44,485 INFO L93 Difference]: Finished difference Result 2336 states and 7723 transitions. [2021-07-13 20:33:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:33:44,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-07-13 20:33:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:44,490 INFO L225 Difference]: With dead ends: 2336 [2021-07-13 20:33:44,490 INFO L226 Difference]: Without dead ends: 2314 [2021-07-13 20:33:44,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1842.2ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:33:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-07-13 20:33:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1818. [2021-07-13 20:33:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-07-13 20:33:44,524 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-07-13 20:33:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:44,524 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-07-13 20:33:44,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-07-13 20:33:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:44,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:44,528 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:44,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-07-13 20:33:44,741 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-07-13 20:33:44,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:44,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746758483] [2021-07-13 20:33:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:45,131 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-07-13 20:33:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:45,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746758483] [2021-07-13 20:33:45,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746758483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537639707] [2021-07-13 20:33:45,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:33:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:45,718 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:33:45,767 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_263, v_prenex_259], 5=[A, v_prenex_261]} [2021-07-13 20:33:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:45,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:45,772 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 23 treesize of output 13 [2021-07-13 20:33:45,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:45,865 INFO L628 ElimStorePlain]: treesize reduction 150, result has 45.5 percent of original size [2021-07-13 20:33:45,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:45,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:45,870 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 23 treesize of output 13 [2021-07-13 20:33:45,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:45,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:45,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:45,902 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 27 treesize of output 13 [2021-07-13 20:33:45,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:45,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:45,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:45,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:45,933 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 27 treesize of output 13 [2021-07-13 20:33:45,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:45,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:45,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:33:45,958 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:41 [2021-07-13 20:33:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:46,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537639707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:46,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:46,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:33:46,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422031652] [2021-07-13 20:33:46,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:33:46,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:33:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:33:46,004 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:47,948 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-07-13 20:33:48,503 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-13 20:33:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:48,663 INFO L93 Difference]: Finished difference Result 2526 states and 8350 transitions. [2021-07-13 20:33:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:33:48,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:33:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:48,667 INFO L225 Difference]: With dead ends: 2526 [2021-07-13 20:33:48,667 INFO L226 Difference]: Without dead ends: 2511 [2021-07-13 20:33:48,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2817.4ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:33:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-07-13 20:33:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1818. [2021-07-13 20:33:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-07-13 20:33:48,720 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-07-13 20:33:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:48,720 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-07-13 20:33:48,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-07-13 20:33:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:48,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:48,722 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:48,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:48,939 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-07-13 20:33:48,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:48,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354993132] [2021-07-13 20:33:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:49,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:49,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354993132] [2021-07-13 20:33:49,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354993132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:49,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483848677] [2021-07-13 20:33:49,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:49,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:49,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:33:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,597 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:33:49,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-13 20:33:49,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,625 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:33:49,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-07-13 20:33:49,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,651 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:33:49,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:33:49,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,676 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:33:49,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:33:49,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,695 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:33:49,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:33:49,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,722 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-13 20:33:49,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:33:49,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,750 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:33:49,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-07-13 20:33:49,751 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,766 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:33:49,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:33:49,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,782 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:33:49,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:33:49,783 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,806 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:33:49,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-07-13 20:33:49,807 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:49,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 20:33:49,837 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,852 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:33:49,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:33:49,853 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,868 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:33:49,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:33:49,869 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,884 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:33:49,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:33:49,884 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,899 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:33:49,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:33:49,899 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,908 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:33:49,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:33:49,908 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,992 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-07-13 20:33:49,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:33:49,993 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-07-13 20:33:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483848677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:50,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:50,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-07-13 20:33:50,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777886520] [2021-07-13 20:33:50,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:33:50,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:33:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:33:50,087 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:52,441 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-13 20:33:52,790 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-07-13 20:33:53,214 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-13 20:33:53,669 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-13 20:33:53,919 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-13 20:33:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:54,288 INFO L93 Difference]: Finished difference Result 3017 states and 9720 transitions. [2021-07-13 20:33:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:33:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:33:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:54,294 INFO L225 Difference]: With dead ends: 3017 [2021-07-13 20:33:54,294 INFO L226 Difference]: Without dead ends: 2970 [2021-07-13 20:33:54,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3783.5ms TimeCoverageRelationStatistics Valid=708, Invalid=3452, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:33:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-07-13 20:33:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1841. [2021-07-13 20:33:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3967391304347827) internal successors, (6250), 1840 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6250 transitions. [2021-07-13 20:33:54,325 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6250 transitions. Word has length 26 [2021-07-13 20:33:54,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:54,325 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6250 transitions. [2021-07-13 20:33:54,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6250 transitions. [2021-07-13 20:33:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:54,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:54,329 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:54,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-07-13 20:33:54,545 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:54,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:54,545 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-07-13 20:33:54,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:54,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784193211] [2021-07-13 20:33:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:54,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:54,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784193211] [2021-07-13 20:33:54,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784193211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:54,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159825756] [2021-07-13 20:33:54,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:54,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:33:54,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:54,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:33:54,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:55,354 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-13 20:33:55,533 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_273, v_prenex_265, v_prenex_277, v_prenex_267, v_prenex_269], 6=[v_prenex_271, v_prenex_275]} [2021-07-13 20:33:55,592 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:33:55,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 51 [2021-07-13 20:33:55,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:55,652 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-07-13 20:33:55,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-07-13 20:33:55,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:56,683 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2021-07-13 20:33:56,683 INFO L628 ElimStorePlain]: treesize reduction 5, result has 99.5 percent of original size [2021-07-13 20:33:56,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:56,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-07-13 20:33:56,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:56,786 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:33:56,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:33:56,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,261 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 183 DAG size of output: 171 [2021-07-13 20:33:58,262 INFO L628 ElimStorePlain]: treesize reduction 45, result has 95.3 percent of original size [2021-07-13 20:33:58,324 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:33:58,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-13 20:33:58,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,390 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:33:58,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-13 20:33:58,398 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:59,395 WARN L205 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 176 [2021-07-13 20:33:59,396 INFO L628 ElimStorePlain]: treesize reduction 44, result has 95.4 percent of original size [2021-07-13 20:33:59,455 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:33:59,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-07-13 20:33:59,462 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:59,506 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:33:59,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-07-13 20:33:59,515 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:00,481 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 167 [2021-07-13 20:34:00,482 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.0 percent of original size [2021-07-13 20:34:00,534 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:34:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-07-13 20:34:00,538 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:00,579 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:34:00,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:34:00,584 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:01,040 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-13 20:34:01,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,083 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-07-13 20:34:01,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-07-13 20:34:01,084 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:01,127 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:34:01,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-07-13 20:34:01,130 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:01,590 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-13 20:34:01,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:01,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-13 20:34:01,639 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:01,679 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:34:01,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-13 20:34:01,685 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:02,110 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-07-13 20:34:02,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:02,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:02,180 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:34:02,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-13 20:34:02,192 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:02,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:02,209 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:34:02,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:34:02,210 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:02,604 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-07-13 20:34:02,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:02,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-13 20:34:02,650 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:957, output treesize:1656 [2021-07-13 20:34:03,196 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-07-13 20:34:03,473 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:34:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:03,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159825756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:03,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:03,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:34:03,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133051180] [2021-07-13 20:34:03,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:34:03,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:03,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:34:03,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:34:03,656 INFO L87 Difference]: Start difference. First operand 1841 states and 6250 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:03,998 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-13 20:34:04,367 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2021-07-13 20:34:04,571 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-13 20:34:04,940 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-07-13 20:34:05,377 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-13 20:34:05,862 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-07-13 20:34:06,005 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-07-13 20:34:06,490 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2021-07-13 20:34:06,965 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-07-13 20:34:07,318 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-07-13 20:34:07,494 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-07-13 20:34:07,794 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2021-07-13 20:34:08,408 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 76 [2021-07-13 20:34:08,664 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-07-13 20:34:08,877 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 50 [2021-07-13 20:34:09,586 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2021-07-13 20:34:10,445 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 77 [2021-07-13 20:34:10,745 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-07-13 20:34:11,213 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-07-13 20:34:11,444 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 33 [2021-07-13 20:34:11,650 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 39 [2021-07-13 20:34:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:11,773 INFO L93 Difference]: Finished difference Result 3177 states and 10241 transitions. [2021-07-13 20:34:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:34:11,773 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:11,778 INFO L225 Difference]: With dead ends: 3177 [2021-07-13 20:34:11,778 INFO L226 Difference]: Without dead ends: 3132 [2021-07-13 20:34:11,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 8598.9ms TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:34:11,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-07-13 20:34:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1888. [2021-07-13 20:34:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.3995760466348703) internal successors, (6415), 1887 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6415 transitions. [2021-07-13 20:34:11,850 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6415 transitions. Word has length 26 [2021-07-13 20:34:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:11,850 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6415 transitions. [2021-07-13 20:34:11,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6415 transitions. [2021-07-13 20:34:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:11,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:11,852 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:12,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2138 [2021-07-13 20:34:12,068 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:12,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-07-13 20:34:12,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:12,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438166483] [2021-07-13 20:34:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:12,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:12,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438166483] [2021-07-13 20:34:12,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438166483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:12,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321458360] [2021-07-13 20:34:12,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:12,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:12,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:12,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:12,845 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:34:12,978 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_287], 6=[v_prenex_285, v_prenex_289]} [2021-07-13 20:34:12,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:12,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:12,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:12,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:12,986 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 27 treesize of output 13 [2021-07-13 20:34:12,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:12,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:12,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:12,991 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 13 [2021-07-13 20:34:12,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,092 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-07-13 20:34:13,093 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-07-13 20:34:13,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:13,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:34:13,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:13,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:13,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:13,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:13,134 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 29 treesize of output 13 [2021-07-13 20:34:13,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:13,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:13,169 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 25 treesize of output 13 [2021-07-13 20:34:13,170 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:13,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:13,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:34:13,197 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-07-13 20:34:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:13,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321458360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:13,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:13,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:34:13,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288239416] [2021-07-13 20:34:13,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:13,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:13,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:13,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:13,242 INFO L87 Difference]: Start difference. First operand 1888 states and 6415 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:14,508 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-07-13 20:34:14,678 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-07-13 20:34:15,107 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-07-13 20:34:15,269 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:34:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:15,463 INFO L93 Difference]: Finished difference Result 2395 states and 7935 transitions. [2021-07-13 20:34:15,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:34:15,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:15,467 INFO L225 Difference]: With dead ends: 2395 [2021-07-13 20:34:15,467 INFO L226 Difference]: Without dead ends: 2380 [2021-07-13 20:34:15,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2402.6ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:34:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-07-13 20:34:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1886. [2021-07-13 20:34:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-07-13 20:34:15,491 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-07-13 20:34:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:15,491 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-07-13 20:34:15,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-07-13 20:34:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:15,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:15,494 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:15,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2263 [2021-07-13 20:34:15,712 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:15,712 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-07-13 20:34:15,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:15,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562262316] [2021-07-13 20:34:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:16,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562262316] [2021-07-13 20:34:16,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562262316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248337786] [2021-07-13 20:34:16,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:16,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:34:16,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:16,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:16,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:16,563 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-13 20:34:16,763 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:34:16,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:16,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:16,966 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:34:16,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-13 20:34:16,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:16,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:16,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:34:16,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:17,394 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-13 20:34:17,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:17,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:17,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:17,435 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:34:17,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:34:17,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:17,465 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:34:17,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:34:17,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:17,832 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-13 20:34:17,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:17,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:17,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:17,866 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:34:17,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:34:17,868 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:17,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:17,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:17,893 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:34:17,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-13 20:34:17,894 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,237 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-13 20:34:18,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,271 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:34:18,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-07-13 20:34:18,272 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:18,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-13 20:34:18,302 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,872 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 140 [2021-07-13 20:34:18,872 INFO L628 ElimStorePlain]: treesize reduction 36, result has 94.8 percent of original size [2021-07-13 20:34:18,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-13 20:34:18,909 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,935 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:34:18,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-13 20:34:18,939 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:19,483 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2021-07-13 20:34:19,483 INFO L628 ElimStorePlain]: treesize reduction 38, result has 94.0 percent of original size [2021-07-13 20:34:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,510 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:34:19,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:34:19,511 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:19,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,536 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:34:19,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-13 20:34:19,538 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:19,774 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:34:19,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,803 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:34:19,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:34:19,806 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:19,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,818 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:19,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:34:19,819 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,014 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:34:20,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:20,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,038 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:34:20,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:34:20,040 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,061 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:34:20,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:34:20,065 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,422 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-07-13 20:34:20,422 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.7 percent of original size [2021-07-13 20:34:20,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-13 20:34:20,436 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:841, output treesize:391 [2021-07-13 20:34:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:20,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248337786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:20,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:20,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-13 20:34:20,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55798166] [2021-07-13 20:34:20,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:34:20,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:20,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:34:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:34:20,624 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:20,978 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-13 20:34:21,247 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-13 20:34:24,903 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-07-13 20:34:34,256 WARN L205 SmtUtils]: Spent 9.10 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-07-13 20:34:35,172 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 154 [2021-07-13 20:34:35,395 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-13 20:34:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:35,676 INFO L93 Difference]: Finished difference Result 2712 states and 8977 transitions. [2021-07-13 20:34:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:34:35,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:35,681 INFO L225 Difference]: With dead ends: 2712 [2021-07-13 20:34:35,681 INFO L226 Difference]: Without dead ends: 2682 [2021-07-13 20:34:35,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 15269.2ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:34:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-07-13 20:34:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1886. [2021-07-13 20:34:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-07-13 20:34:35,708 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-07-13 20:34:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:35,708 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-07-13 20:34:35,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-07-13 20:34:35,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:35,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:35,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:35,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2277 [2021-07-13 20:34:35,927 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:35,927 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 54 times [2021-07-13 20:34:35,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:35,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580285458] [2021-07-13 20:34:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:36,342 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-07-13 20:34:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:36,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:36,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580285458] [2021-07-13 20:34:36,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580285458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:36,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065489125] [2021-07-13 20:34:36,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:36,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:34:36,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:36,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:36,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,659 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:34:36,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:34:36,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,693 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:34:36,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-13 20:34:36,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,715 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:34:36,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,733 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:34:36,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,760 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-13 20:34:36,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:34:36,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:36,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 20:34:36,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,819 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:34:36,819 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,839 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:34:36,840 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,855 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:34:36,856 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,881 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:34:36,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:34:36,883 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,899 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:34:36,899 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,916 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:34:36,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,936 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:34:36,937 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,956 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:34:36,957 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,974 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:34:36,975 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,986 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:34:36,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:34:36,986 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:37,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:37,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:34:37,030 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-07-13 20:34:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:37,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065489125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:37,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:37,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:34:37,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930135499] [2021-07-13 20:34:37,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:37,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:37,129 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:38,002 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-13 20:34:38,563 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-13 20:34:39,199 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-07-13 20:34:39,534 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-13 20:34:39,859 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-13 20:34:40,072 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-13 20:34:40,235 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-13 20:34:40,754 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-13 20:34:40,914 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-07-13 20:34:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:41,122 INFO L93 Difference]: Finished difference Result 3398 states and 10882 transitions. [2021-07-13 20:34:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:34:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-07-13 20:34:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:41,128 INFO L225 Difference]: With dead ends: 3398 [2021-07-13 20:34:41,128 INFO L226 Difference]: Without dead ends: 3364 [2021-07-13 20:34:41,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3964.8ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:34:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-07-13 20:34:41,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 1892. [2021-07-13 20:34:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.405076679005817) internal successors, (6439), 1891 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6439 transitions. [2021-07-13 20:34:41,161 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6439 transitions. Word has length 26 [2021-07-13 20:34:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:41,161 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6439 transitions. [2021-07-13 20:34:41,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6439 transitions. [2021-07-13 20:34:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:41,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:41,164 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:41,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2347 [2021-07-13 20:34:41,380 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:41,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 33 times [2021-07-13 20:34:41,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:41,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476149612] [2021-07-13 20:34:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:41,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:41,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476149612] [2021-07-13 20:34:41,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476149612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:41,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551251300] [2021-07-13 20:34:41,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:41,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:41,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:41,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:41,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:42,273 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-13 20:34:42,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:42,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:42,392 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 21 treesize of output 13 [2021-07-13 20:34:42,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:42,547 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:34:42,547 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-07-13 20:34:42,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:42,552 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 21 treesize of output 13 [2021-07-13 20:34:42,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:42,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:42,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:42,612 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 28 treesize of output 16 [2021-07-13 20:34:42,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:42,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:42,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:42,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:42,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:42,670 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 28 treesize of output 16 [2021-07-13 20:34:42,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:42,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:42,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:42,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:42,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:42,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:34:42,721 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-07-13 20:34:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:42,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551251300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:42,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:42,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:34:42,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814942041] [2021-07-13 20:34:42,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:34:42,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:42,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:34:42,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:34:42,772 INFO L87 Difference]: Start difference. First operand 1892 states and 6439 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:43,564 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-13 20:34:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:43,756 INFO L93 Difference]: Finished difference Result 2313 states and 7725 transitions. [2021-07-13 20:34:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:34:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-07-13 20:34:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:43,760 INFO L225 Difference]: With dead ends: 2313 [2021-07-13 20:34:43,760 INFO L226 Difference]: Without dead ends: 2298 [2021-07-13 20:34:43,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1426.4ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-13 20:34:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1884. [2021-07-13 20:34:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.4083908656399364) internal successors, (6418), 1883 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6418 transitions. [2021-07-13 20:34:43,785 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6418 transitions. Word has length 26 [2021-07-13 20:34:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:43,785 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6418 transitions. [2021-07-13 20:34:43,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6418 transitions. [2021-07-13 20:34:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:43,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:43,821 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:44,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-07-13 20:34:44,037 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:44,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1200955766, now seen corresponding path program 34 times [2021-07-13 20:34:44,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:44,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994778842] [2021-07-13 20:34:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:44,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:44,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994778842] [2021-07-13 20:34:44,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994778842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:44,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223897839] [2021-07-13 20:34:44,420 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:44,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:44,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:44,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,724 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 21 treesize of output 13 [2021-07-13 20:34:44,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,730 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 31 treesize of output 19 [2021-07-13 20:34:44,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,735 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 28 treesize of output 16 [2021-07-13 20:34:44,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,741 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 33 treesize of output 19 [2021-07-13 20:34:44,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,747 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 26 treesize of output 13 [2021-07-13 20:34:44,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,753 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 31 treesize of output 19 [2021-07-13 20:34:44,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,759 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 33 treesize of output 19 [2021-07-13 20:34:44,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,766 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 26 treesize of output 13 [2021-07-13 20:34:44,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,772 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 33 treesize of output 19 [2021-07-13 20:34:44,773 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,778 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 28 treesize of output 16 [2021-07-13 20:34:44,779 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,784 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 33 treesize of output 19 [2021-07-13 20:34:44,785 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,789 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 21 treesize of output 13 [2021-07-13 20:34:44,789 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,794 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 36 treesize of output 19 [2021-07-13 20:34:44,795 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,799 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 28 treesize of output 16 [2021-07-13 20:34:44,799 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:44,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:44,802 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 28 treesize of output 16 [2021-07-13 20:34:44,802 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:44,865 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:34:44,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:34:44,866 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:34:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:44,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223897839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:44,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:44,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:34:44,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908156095] [2021-07-13 20:34:44,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:34:44,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:44,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:34:44,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:34:44,912 INFO L87 Difference]: Start difference. First operand 1884 states and 6418 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:45,158 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-13 20:34:45,487 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-07-13 20:34:45,930 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-13 20:34:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:46,126 INFO L93 Difference]: Finished difference Result 2549 states and 8455 transitions. [2021-07-13 20:34:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:34:46,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-07-13 20:34:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:46,131 INFO L225 Difference]: With dead ends: 2549 [2021-07-13 20:34:46,131 INFO L226 Difference]: Without dead ends: 2534 [2021-07-13 20:34:46,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1440.6ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:34:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-07-13 20:34:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1876. [2021-07-13 20:34:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.4074666666666666) internal successors, (6389), 1875 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6389 transitions. [2021-07-13 20:34:46,157 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6389 transitions. Word has length 26 [2021-07-13 20:34:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:46,157 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 6389 transitions. [2021-07-13 20:34:46,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6389 transitions. [2021-07-13 20:34:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:46,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:46,160 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:46,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:46,374 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:46,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:46,374 INFO L82 PathProgramCache]: Analyzing trace with hash -179287784, now seen corresponding path program 35 times [2021-07-13 20:34:46,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:46,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681193461] [2021-07-13 20:34:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:46,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681193461] [2021-07-13 20:34:46,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681193461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057699805] [2021-07-13 20:34:46,780 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:46,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:34:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:46,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:47,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:47,457 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:34:47,457 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:34:47,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:47,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:47,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:47,478 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:34:47,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:47,638 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:34:47,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:47,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:47,662 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:47,662 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:34:47,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:47,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:47,685 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:47,685 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:34:47,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:47,832 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:34:47,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:47,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:47,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:47,851 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:34:47,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:47,871 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:34:47,871 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:34:47,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:48,010 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:34:48,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:48,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:48,034 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:48,034 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:34:48,038 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:48,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:48,053 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:34:48,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:48,181 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-13 20:34:48,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:48,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:34:48,203 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:314 [2021-07-13 20:34:48,425 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-13 20:34:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:48,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057699805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:48,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:48,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:34:48,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668258049] [2021-07-13 20:34:48,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:48,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:48,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:48,532 INFO L87 Difference]: Start difference. First operand 1876 states and 6389 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:49,315 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-13 20:34:49,530 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-07-13 20:34:49,866 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-13 20:34:50,258 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-13 20:34:50,721 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-13 20:34:51,025 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-07-13 20:34:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:51,097 INFO L93 Difference]: Finished difference Result 2284 states and 7582 transitions. [2021-07-13 20:34:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:34:51,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:34:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:51,102 INFO L225 Difference]: With dead ends: 2284 [2021-07-13 20:34:51,103 INFO L226 Difference]: Without dead ends: 2269 [2021-07-13 20:34:51,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2595.7ms TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:34:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-07-13 20:34:51,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1867. [2021-07-13 20:34:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.404608788853162) internal successors, (6353), 1866 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6353 transitions. [2021-07-13 20:34:51,156 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6353 transitions. Word has length 26 [2021-07-13 20:34:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:51,156 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6353 transitions. [2021-07-13 20:34:51,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6353 transitions. [2021-07-13 20:34:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:51,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:51,173 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:51,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2424,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:51,390 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 36 times [2021-07-13 20:34:51,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:51,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483534918] [2021-07-13 20:34:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:51,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:51,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483534918] [2021-07-13 20:34:51,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483534918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:51,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813773775] [2021-07-13 20:34:51,742 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:51,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:51,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:51,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:51,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,006 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:52,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:52,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,016 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:52,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:52,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,030 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:52,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:34:52,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,040 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:52,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:52,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,052 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:52,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:34:52,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:34:52,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,076 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:52,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:52,077 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:34:52,090 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:34:52,103 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,112 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:52,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:34:52,112 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,121 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:52,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:34:52,122 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:34:52,134 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,145 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:52,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:34:52,146 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:34:52,159 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,167 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:52,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:34:52,168 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:52,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:34:52,173 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:34:52,247 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:34:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:52,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813773775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:52,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:52,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:34:52,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374174951] [2021-07-13 20:34:52,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:52,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:52,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:52,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:52,429 INFO L87 Difference]: Start difference. First operand 1867 states and 6353 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:52,956 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-13 20:34:53,312 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-07-13 20:34:53,484 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-07-13 20:34:53,633 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-13 20:34:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:53,812 INFO L93 Difference]: Finished difference Result 2064 states and 6910 transitions. [2021-07-13 20:34:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:34:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:34:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:53,816 INFO L225 Difference]: With dead ends: 2064 [2021-07-13 20:34:53,816 INFO L226 Difference]: Without dead ends: 2049 [2021-07-13 20:34:53,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1640.7ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:34:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-07-13 20:34:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1860. [2021-07-13 20:34:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-07-13 20:34:53,839 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-07-13 20:34:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:53,839 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-07-13 20:34:53,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-07-13 20:34:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:53,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:53,841 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:54,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2491,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:54,042 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:54,042 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 37 times [2021-07-13 20:34:54,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:54,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948030148] [2021-07-13 20:34:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:54,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:54,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948030148] [2021-07-13 20:34:54,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948030148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:54,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132999749] [2021-07-13 20:34:54,381 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:54,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:34:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,711 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 28 treesize of output 16 [2021-07-13 20:34:54,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,717 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 21 treesize of output 13 [2021-07-13 20:34:54,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,722 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 36 treesize of output 19 [2021-07-13 20:34:54,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,727 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 33 treesize of output 19 [2021-07-13 20:34:54,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:34:54,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,738 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 33 treesize of output 19 [2021-07-13 20:34:54,739 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,744 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 31 treesize of output 19 [2021-07-13 20:34:54,744 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,749 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 28 treesize of output 16 [2021-07-13 20:34:54,750 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,754 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 21 treesize of output 13 [2021-07-13 20:34:54,755 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,759 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 28 treesize of output 16 [2021-07-13 20:34:54,760 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,764 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 33 treesize of output 19 [2021-07-13 20:34:54,765 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,770 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 26 treesize of output 13 [2021-07-13 20:34:54,770 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,775 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 31 treesize of output 19 [2021-07-13 20:34:54,775 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,779 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 28 treesize of output 16 [2021-07-13 20:34:54,780 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:54,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:54,783 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 33 treesize of output 19 [2021-07-13 20:34:54,784 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,861 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:34:54,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:34:54,863 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:34:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:54,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132999749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:54,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:54,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:34:54,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930343916] [2021-07-13 20:34:54,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:34:54,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:34:54,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:34:54,914 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:55,566 INFO L93 Difference]: Finished difference Result 2341 states and 7786 transitions. [2021-07-13 20:34:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:34:55,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-07-13 20:34:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:55,570 INFO L225 Difference]: With dead ends: 2341 [2021-07-13 20:34:55,570 INFO L226 Difference]: Without dead ends: 2320 [2021-07-13 20:34:55,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 934.2ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-13 20:34:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1860. [2021-07-13 20:34:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-07-13 20:34:55,595 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-07-13 20:34:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:55,595 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-07-13 20:34:55,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-07-13 20:34:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:55,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:55,598 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:55,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2508 [2021-07-13 20:34:55,814 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 38 times [2021-07-13 20:34:55,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:55,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042665120] [2021-07-13 20:34:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:56,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:56,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042665120] [2021-07-13 20:34:56,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042665120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:56,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564843438] [2021-07-13 20:34:56,132 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:56,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:56,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:56,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,463 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:56,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:56,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,471 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:56,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:34:56,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,479 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:56,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:34:56,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,489 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:56,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:56,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,498 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:56,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:34:56,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,507 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:56,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:56,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:34:56,519 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:56,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:34:56,528 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:34:56,540 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:34:56,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:34:56,569 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:34:56,584 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,596 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:56,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:34:56,597 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,609 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:56,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:34:56,611 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,622 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:56,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:34:56,623 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,629 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:56,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:56,630 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:34:56,719 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-13 20:34:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:56,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564843438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:56,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:56,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:34:56,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731933959] [2021-07-13 20:34:56,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:56,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:56,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:56,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:56,930 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:57,475 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-13 20:34:58,063 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-07-13 20:34:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:58,112 INFO L93 Difference]: Finished difference Result 2236 states and 7452 transitions. [2021-07-13 20:34:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:34:58,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:34:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:58,116 INFO L225 Difference]: With dead ends: 2236 [2021-07-13 20:34:58,116 INFO L226 Difference]: Without dead ends: 2207 [2021-07-13 20:34:58,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1440.6ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:34:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-07-13 20:34:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1840. [2021-07-13 20:34:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.3953235454051116) internal successors, (6244), 1839 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6244 transitions. [2021-07-13 20:34:58,139 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6244 transitions. Word has length 26 [2021-07-13 20:34:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:58,139 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6244 transitions. [2021-07-13 20:34:58,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6244 transitions. [2021-07-13 20:34:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:58,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:58,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:58,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2542 [2021-07-13 20:34:58,357 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-07-13 20:34:58,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:58,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017333979] [2021-07-13 20:34:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:58,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:58,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017333979] [2021-07-13 20:34:58,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017333979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:58,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126468655] [2021-07-13 20:34:58,646 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:58,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:58,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:58,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:58,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:59,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:59,083 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:59,083 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:34:59,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:59,108 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:59,108 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:34:59,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:59,257 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:34:59,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:59,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:59,276 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:34:59,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:59,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:59,297 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:59,297 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:34:59,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:59,595 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-07-13 20:34:59,595 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-07-13 20:34:59,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:59,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:59,612 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:34:59,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:59,633 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:34:59,633 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:34:59,634 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:59,767 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:34:59,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:59,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:59,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:59,784 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:34:59,790 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:59,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:59,804 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:34:59,805 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:34:59,806 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,041 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-13 20:35:00,041 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-07-13 20:35:00,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:00,057 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-07-13 20:35:00,240 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-13 20:35:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:00,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126468655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:00,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:00,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:35:00,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15617270] [2021-07-13 20:35:00,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:00,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:00,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:00,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:00,357 INFO L87 Difference]: Start difference. First operand 1840 states and 6244 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:01,026 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 20:35:01,224 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-07-13 20:35:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:01,270 INFO L93 Difference]: Finished difference Result 2047 states and 6843 transitions. [2021-07-13 20:35:01,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:35:01,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:35:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:01,273 INFO L225 Difference]: With dead ends: 2047 [2021-07-13 20:35:01,274 INFO L226 Difference]: Without dead ends: 2022 [2021-07-13 20:35:01,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1276.8ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-07-13 20:35:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1822. [2021-07-13 20:35:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.399231191652938) internal successors, (6190), 1821 states have internal predecessors, (6190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6190 transitions. [2021-07-13 20:35:01,296 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6190 transitions. Word has length 26 [2021-07-13 20:35:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:01,296 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6190 transitions. [2021-07-13 20:35:01,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6190 transitions. [2021-07-13 20:35:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:01,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:01,299 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:01,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:01,514 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash 827344434, now seen corresponding path program 40 times [2021-07-13 20:35:01,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:01,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764745862] [2021-07-13 20:35:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:01,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:01,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764745862] [2021-07-13 20:35:01,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764745862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:01,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635779599] [2021-07-13 20:35:01,917 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:01,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:01,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:01,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:01,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:02,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,233 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:02,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:02,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:35:02,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,263 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:02,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,280 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:02,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:35:02,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:02,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-13 20:35:02,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,312 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:02,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,325 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:02,326 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:02,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-13 20:35:02,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,359 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:02,359 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:02,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-13 20:35:02,377 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,389 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:02,390 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,402 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:35:02,402 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:02,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:35:02,418 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,429 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:02,430 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:02,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-13 20:35:02,445 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:02,456 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:02,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-13 20:35:02,457 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:02,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:02,534 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-13 20:35:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:02,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635779599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:02,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:02,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:35:02,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120190752] [2021-07-13 20:35:02,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:02,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:02,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:02,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:02,732 INFO L87 Difference]: Start difference. First operand 1822 states and 6190 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:03,358 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-07-13 20:35:03,983 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-13 20:35:04,136 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-13 20:35:04,433 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:35:04,756 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-13 20:35:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:04,831 INFO L93 Difference]: Finished difference Result 2419 states and 8019 transitions. [2021-07-13 20:35:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:35:04,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:35:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:04,837 INFO L225 Difference]: With dead ends: 2419 [2021-07-13 20:35:04,837 INFO L226 Difference]: Without dead ends: 2400 [2021-07-13 20:35:04,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2323.8ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:35:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-07-13 20:35:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1803. [2021-07-13 20:35:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 3.3990011098779136) internal successors, (6125), 1802 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 6125 transitions. [2021-07-13 20:35:04,865 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 6125 transitions. Word has length 26 [2021-07-13 20:35:04,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:04,866 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 6125 transitions. [2021-07-13 20:35:04,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 6125 transitions. [2021-07-13 20:35:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:04,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:04,868 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:05,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2637,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:05,085 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-07-13 20:35:05,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:05,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706397884] [2021-07-13 20:35:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:05,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706397884] [2021-07-13 20:35:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706397884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663286330] [2021-07-13 20:35:05,420 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:05,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:05,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:05,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:35:05,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:05,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,829 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 28 treesize of output 16 [2021-07-13 20:35:05,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,834 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 28 treesize of output 16 [2021-07-13 20:35:05,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,839 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 33 treesize of output 19 [2021-07-13 20:35:05,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,844 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 33 treesize of output 19 [2021-07-13 20:35:05,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,850 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 31 treesize of output 19 [2021-07-13 20:35:05,850 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,855 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 26 treesize of output 13 [2021-07-13 20:35:05,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,860 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 21 treesize of output 13 [2021-07-13 20:35:05,861 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,866 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 36 treesize of output 19 [2021-07-13 20:35:05,867 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,871 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 26 treesize of output 13 [2021-07-13 20:35:05,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,876 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 28 treesize of output 16 [2021-07-13 20:35:05,877 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,882 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 31 treesize of output 19 [2021-07-13 20:35:05,882 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,887 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 33 treesize of output 19 [2021-07-13 20:35:05,887 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,892 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 21 treesize of output 13 [2021-07-13 20:35:05,892 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,897 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 33 treesize of output 19 [2021-07-13 20:35:05,898 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,901 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 28 treesize of output 16 [2021-07-13 20:35:05,902 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,983 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:35:05,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:05,985 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:35:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:06,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663286330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:06,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:06,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:35:06,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180495158] [2021-07-13 20:35:06,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:06,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:06,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:06,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:06,070 INFO L87 Difference]: Start difference. First operand 1803 states and 6125 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:06,611 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-13 20:35:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:06,978 INFO L93 Difference]: Finished difference Result 2310 states and 7688 transitions. [2021-07-13 20:35:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:35:06,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-07-13 20:35:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:06,983 INFO L225 Difference]: With dead ends: 2310 [2021-07-13 20:35:06,983 INFO L226 Difference]: Without dead ends: 2295 [2021-07-13 20:35:06,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1130.4ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:35:06,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-13 20:35:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1848. [2021-07-13 20:35:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-07-13 20:35:07,012 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-07-13 20:35:07,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:07,012 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-07-13 20:35:07,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-07-13 20:35:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:07,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:07,015 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:07,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-07-13 20:35:07,217 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-07-13 20:35:07,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:07,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459163830] [2021-07-13 20:35:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:07,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:07,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459163830] [2021-07-13 20:35:07,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459163830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:07,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781264516] [2021-07-13 20:35:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:07,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:35:07,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:07,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:35:07,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:07,851 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:07,851 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:07,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,860 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:07,860 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:35:07,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,881 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:07,881 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:07,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,904 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:07,904 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:35:07,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,916 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:07,916 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:35:07,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,927 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:07,927 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:35:07,927 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:07,975 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:35:07,981 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:07,998 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:35:07,999 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,019 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:08,019 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:35:08,022 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,044 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:08,044 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:35:08,046 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,055 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:08,055 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:08,056 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,076 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:08,076 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:35:08,079 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,088 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:08,088 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:35:08,089 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,098 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:08,098 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:08,099 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,107 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:08,107 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:08,108 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:08,120 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:35:08,122 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,236 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:35:08,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:08,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:08,249 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-07-13 20:35:08,482 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-13 20:35:08,711 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-13 20:35:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:08,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781264516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:08,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:08,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:35:08,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484558926] [2021-07-13 20:35:08,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:08,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:08,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:08,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:08,832 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:09,310 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-07-13 20:35:09,704 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-13 20:35:10,048 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-13 20:35:10,192 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-07-13 20:35:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:10,260 INFO L93 Difference]: Finished difference Result 2570 states and 8519 transitions. [2021-07-13 20:35:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:35:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:10,266 INFO L225 Difference]: With dead ends: 2570 [2021-07-13 20:35:10,266 INFO L226 Difference]: Without dead ends: 2555 [2021-07-13 20:35:10,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1973.8ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:35:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-07-13 20:35:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1848. [2021-07-13 20:35:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:10,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-07-13 20:35:10,299 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-07-13 20:35:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:10,299 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-07-13 20:35:10,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:10,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-07-13 20:35:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:10,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:10,302 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:10,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2690 [2021-07-13 20:35:10,518 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:10,518 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-07-13 20:35:10,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:10,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965252616] [2021-07-13 20:35:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:10,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:10,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965252616] [2021-07-13 20:35:10,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965252616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:10,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726237447] [2021-07-13 20:35:10,741 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:35:10,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:11,042 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_327, v_prenex_329], 3=[A, v_prenex_331]} [2021-07-13 20:35:11,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:11,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:11,051 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 28 treesize of output 16 [2021-07-13 20:35:11,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:11,058 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 28 treesize of output 16 [2021-07-13 20:35:11,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,193 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-13 20:35:11,194 INFO L628 ElimStorePlain]: treesize reduction 129, result has 54.9 percent of original size [2021-07-13 20:35:11,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:11,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:11,200 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 28 treesize of output 16 [2021-07-13 20:35:11,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:11,205 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 28 treesize of output 16 [2021-07-13 20:35:11,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:35:11,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:11,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,297 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 23 treesize of output 13 [2021-07-13 20:35:11,299 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:11,336 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:325, output treesize:51 [2021-07-13 20:35:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:11,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726237447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:11,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:11,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:35:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925785792] [2021-07-13 20:35:11,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:11,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:11,398 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:12,061 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-07-13 20:35:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:12,191 INFO L93 Difference]: Finished difference Result 2415 states and 7997 transitions. [2021-07-13 20:35:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:35:12,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:35:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:12,196 INFO L225 Difference]: With dead ends: 2415 [2021-07-13 20:35:12,196 INFO L226 Difference]: Without dead ends: 2385 [2021-07-13 20:35:12,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 973.0ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:35:12,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-07-13 20:35:12,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1850. [2021-07-13 20:35:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.3958896700919414) internal successors, (6279), 1849 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6279 transitions. [2021-07-13 20:35:12,225 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6279 transitions. Word has length 26 [2021-07-13 20:35:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:12,226 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 6279 transitions. [2021-07-13 20:35:12,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6279 transitions. [2021-07-13 20:35:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:12,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:12,228 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:12,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-07-13 20:35:12,441 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-07-13 20:35:12,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:12,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931143707] [2021-07-13 20:35:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:12,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:12,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931143707] [2021-07-13 20:35:12,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931143707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:12,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832940657] [2021-07-13 20:35:12,790 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:12,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:12,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:12,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:35:12,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:13,005 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-07-13 20:35:13,162 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 20:35:13,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:13,386 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:13,386 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:35:13,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:13,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:13,416 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:13,417 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:35:13,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:13,588 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:35:13,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:13,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:13,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:13,608 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:35:13,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:13,633 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:13,633 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:35:13,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:13,793 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:35:13,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:13,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:13,815 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:35:13,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:13,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:13,839 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:13,839 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:35:13,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:14,146 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-07-13 20:35:14,146 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-07-13 20:35:14,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:14,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:14,163 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:35:14,169 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:14,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:14,186 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:14,186 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:14,187 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:14,452 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-13 20:35:14,452 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.7 percent of original size [2021-07-13 20:35:14,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:14,468 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:256 [2021-07-13 20:35:14,663 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-13 20:35:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:14,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832940657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:14,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:14,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:35:14,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385070049] [2021-07-13 20:35:14,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:35:14,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:14,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:35:14,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:35:14,762 INFO L87 Difference]: Start difference. First operand 1850 states and 6279 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:15,260 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-07-13 20:35:15,787 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-13 20:35:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:15,817 INFO L93 Difference]: Finished difference Result 2425 states and 8078 transitions. [2021-07-13 20:35:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:35:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 26 [2021-07-13 20:35:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:15,821 INFO L225 Difference]: With dead ends: 2425 [2021-07-13 20:35:15,821 INFO L226 Difference]: Without dead ends: 2410 [2021-07-13 20:35:15,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1646.1ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:35:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-07-13 20:35:15,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1868. [2021-07-13 20:35:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.392072844134976) internal successors, (6333), 1867 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6333 transitions. [2021-07-13 20:35:15,847 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6333 transitions. Word has length 26 [2021-07-13 20:35:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:15,847 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6333 transitions. [2021-07-13 20:35:15,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6333 transitions. [2021-07-13 20:35:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:15,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:15,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:16,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:16,067 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:16,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-07-13 20:35:16,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:16,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456178091] [2021-07-13 20:35:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:16,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:16,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456178091] [2021-07-13 20:35:16,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456178091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:16,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950657588] [2021-07-13 20:35:16,439 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:16,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:16,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:16,910 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:35:17,198 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-07-13 20:35:17,277 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_349, v_prenex_347], 2=[A, v_prenex_348]} [2021-07-13 20:35:17,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:17,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:17,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:17,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:35:17,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,432 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 20:35:17,433 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-07-13 20:35:17,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:17,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:35:17,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:17,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:17,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:17,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:17,497 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 28 treesize of output 16 [2021-07-13 20:35:17,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:17,502 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 21 treesize of output 13 [2021-07-13 20:35:17,503 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:17,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:17,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:17,550 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 28 treesize of output 16 [2021-07-13 20:35:17,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:17,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:17,590 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:285, output treesize:51 [2021-07-13 20:35:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:17,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950657588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:17,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:17,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:35:17,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370604100] [2021-07-13 20:35:17,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:35:17,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:17,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:35:17,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:35:17,646 INFO L87 Difference]: Start difference. First operand 1868 states and 6333 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:17,905 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-07-13 20:35:18,556 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:35:18,809 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-07-13 20:35:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:18,921 INFO L93 Difference]: Finished difference Result 2321 states and 7745 transitions. [2021-07-13 20:35:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:35:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-07-13 20:35:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:18,925 INFO L225 Difference]: With dead ends: 2321 [2021-07-13 20:35:18,925 INFO L226 Difference]: Without dead ends: 2306 [2021-07-13 20:35:18,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1885.7ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:35:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-07-13 20:35:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1889. [2021-07-13 20:35:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 3.3887711864406778) internal successors, (6398), 1888 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6398 transitions. [2021-07-13 20:35:18,951 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6398 transitions. Word has length 26 [2021-07-13 20:35:18,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:18,951 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 6398 transitions. [2021-07-13 20:35:18,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:18,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6398 transitions. [2021-07-13 20:35:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:18,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:18,954 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:19,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-07-13 20:35:19,170 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:19,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-07-13 20:35:19,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:19,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597039174] [2021-07-13 20:35:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:19,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:19,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597039174] [2021-07-13 20:35:19,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597039174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:19,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589316190] [2021-07-13 20:35:19,513 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:19,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:19,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:19,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:19,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:19,949 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-13 20:35:20,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:20,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,122 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:35:20,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:35:20,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,284 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:35:20,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,303 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:20,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:20,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,415 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-13 20:35:20,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:20,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,547 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:35:20,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:20,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:35:20,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,674 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-13 20:35:20,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,686 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:20,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:20,688 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,798 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-13 20:35:20,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:20,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,919 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:35:20,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:35:20,932 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:21,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:21,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:21,023 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:35:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:21,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589316190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:21,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:21,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:35:21,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412191787] [2021-07-13 20:35:21,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:35:21,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:21,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:35:21,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:35:21,225 INFO L87 Difference]: Start difference. First operand 1889 states and 6398 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:22,000 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:35:22,438 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-07-13 20:35:22,842 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:35:22,964 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-07-13 20:35:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:23,119 INFO L93 Difference]: Finished difference Result 2617 states and 8667 transitions. [2021-07-13 20:35:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:35:23,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-07-13 20:35:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:23,126 INFO L225 Difference]: With dead ends: 2617 [2021-07-13 20:35:23,126 INFO L226 Difference]: Without dead ends: 2602 [2021-07-13 20:35:23,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2212.1ms TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:35:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-07-13 20:35:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1886. [2021-07-13 20:35:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.389920424403183) internal successors, (6390), 1885 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6390 transitions. [2021-07-13 20:35:23,168 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6390 transitions. Word has length 26 [2021-07-13 20:35:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:23,168 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6390 transitions. [2021-07-13 20:35:23,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6390 transitions. [2021-07-13 20:35:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:23,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:23,173 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:23,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2825,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:23,389 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:23,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-07-13 20:35:23,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:23,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156808483] [2021-07-13 20:35:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:23,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:23,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156808483] [2021-07-13 20:35:23,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156808483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:23,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994375471] [2021-07-13 20:35:23,670 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:23,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:35:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:24,096 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-13 20:35:24,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:24,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:35:24,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:24,212 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:24,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:24,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,342 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:35:24,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:24,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:35:24,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:24,367 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:24,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:24,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,492 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:35:24,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:24,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:24,510 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:24,521 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:24,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:35:24,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,632 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-13 20:35:24,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:24,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:24,645 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:24,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:24,657 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,762 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-13 20:35:24,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:24,769 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-07-13 20:35:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:24,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994375471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:24,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:24,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:35:24,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878645661] [2021-07-13 20:35:24,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:24,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:24,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:24,960 INFO L87 Difference]: Start difference. First operand 1886 states and 6390 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:25,881 INFO L93 Difference]: Finished difference Result 2461 states and 8175 transitions. [2021-07-13 20:35:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:35:25,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:35:25,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:25,886 INFO L225 Difference]: With dead ends: 2461 [2021-07-13 20:35:25,886 INFO L226 Difference]: Without dead ends: 2436 [2021-07-13 20:35:25,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1330.5ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:35:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-07-13 20:35:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1886. [2021-07-13 20:35:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-07-13 20:35:25,915 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-07-13 20:35:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:25,915 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-07-13 20:35:25,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-07-13 20:35:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:25,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:25,918 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:26,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-07-13 20:35:26,121 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-07-13 20:35:26,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:26,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957517273] [2021-07-13 20:35:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:26,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:26,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957517273] [2021-07-13 20:35:26,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957517273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:26,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051217520] [2021-07-13 20:35:26,443 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:26,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:26,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:26,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:35:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,643 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:26,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:26,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,651 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:26,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:26,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,662 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:26,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:26,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,670 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:26,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:26,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,680 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:26,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:26,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:26,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:26,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,699 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:26,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:26,700 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:26,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:35:26,711 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:26,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:35:26,723 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,731 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:26,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:35:26,732 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,739 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:26,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:35:26,740 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:26,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:26,751 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,761 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:35:26,762 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:26,773 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,780 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:26,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:35:26,781 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:26,785 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:26,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:35:26,786 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:26,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:26,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:26,851 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:35:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:27,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051217520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:27,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:27,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:35:27,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171944433] [2021-07-13 20:35:27,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:27,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:27,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:27,086 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:27,821 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 20:35:28,002 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-13 20:35:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:28,067 INFO L93 Difference]: Finished difference Result 2412 states and 8043 transitions. [2021-07-13 20:35:28,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:35:28,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:35:28,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:28,072 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:35:28,072 INFO L226 Difference]: Without dead ends: 2397 [2021-07-13 20:35:28,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1281.9ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:35:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-07-13 20:35:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1886. [2021-07-13 20:35:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-07-13 20:35:28,099 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-07-13 20:35:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:28,099 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-07-13 20:35:28,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-07-13 20:35:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:28,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:28,102 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:28,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:28,317 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-07-13 20:35:28,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:28,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755962974] [2021-07-13 20:35:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:28,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:28,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755962974] [2021-07-13 20:35:28,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755962974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:28,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377717142] [2021-07-13 20:35:28,667 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:28,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:28,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:35:29,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:35:29,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:29,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:29,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:35:29,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:35:29,178 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:35:29,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:35:29,193 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:29,201 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:35:29,208 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:35:29,216 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:35:29,224 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:35:29,233 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:29,241 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:29,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:29,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:35:29,245 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:29,276 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-13 20:35:29,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:29,277 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:35:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:29,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377717142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:29,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:29,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:35:29,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719031239] [2021-07-13 20:35:29,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:35:29,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:29,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:35:29,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:35:29,306 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-07-13 20:35:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:29,989 INFO L93 Difference]: Finished difference Result 2181 states and 7107 transitions. [2021-07-13 20:35:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:35:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 26 [2021-07-13 20:35:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:29,993 INFO L225 Difference]: With dead ends: 2181 [2021-07-13 20:35:29,993 INFO L226 Difference]: Without dead ends: 2144 [2021-07-13 20:35:29,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 926.6ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:35:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-07-13 20:35:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1906. [2021-07-13 20:35:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.391076115485564) internal successors, (6460), 1905 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6460 transitions. [2021-07-13 20:35:30,023 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6460 transitions. Word has length 26 [2021-07-13 20:35:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:30,023 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6460 transitions. [2021-07-13 20:35:30,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-07-13 20:35:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6460 transitions. [2021-07-13 20:35:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:30,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:30,025 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:30,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-07-13 20:35:30,241 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-07-13 20:35:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:30,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369371832] [2021-07-13 20:35:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:30,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:30,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369371832] [2021-07-13 20:35:30,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369371832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:30,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372085970] [2021-07-13 20:35:30,591 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:30,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:30,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:30,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:30,877 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_376, v_prenex_378], 6=[A, v_prenex_374]} [2021-07-13 20:35:30,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:30,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:30,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:30,885 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 20 treesize of output 7 [2021-07-13 20:35:30,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:30,891 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 27 treesize of output 13 [2021-07-13 20:35:30,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:30,988 INFO L628 ElimStorePlain]: treesize reduction 156, result has 44.9 percent of original size [2021-07-13 20:35:30,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:30,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:30,992 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 25 treesize of output 13 [2021-07-13 20:35:30,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:31,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:31,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:31,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:31,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:31,030 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 29 treesize of output 13 [2021-07-13 20:35:31,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:31,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:31,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:31,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:31,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:31,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:31,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:35:31,066 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:31,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:31,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:35:31,093 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:41 [2021-07-13 20:35:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:31,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372085970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:31,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:31,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:35:31,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752506192] [2021-07-13 20:35:31,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:35:31,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:31,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:35:31,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:35:31,134 INFO L87 Difference]: Start difference. First operand 1906 states and 6460 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-07-13 20:35:32,079 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-07-13 20:35:32,206 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-13 20:35:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:32,327 INFO L93 Difference]: Finished difference Result 2358 states and 7788 transitions. [2021-07-13 20:35:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:35:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 26 [2021-07-13 20:35:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:32,332 INFO L225 Difference]: With dead ends: 2358 [2021-07-13 20:35:32,332 INFO L226 Difference]: Without dead ends: 2312 [2021-07-13 20:35:32,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1400.9ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:35:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-07-13 20:35:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1906. [2021-07-13 20:35:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.3858267716535435) internal successors, (6450), 1905 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6450 transitions. [2021-07-13 20:35:32,362 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6450 transitions. Word has length 26 [2021-07-13 20:35:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:32,363 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6450 transitions. [2021-07-13 20:35:32,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-07-13 20:35:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6450 transitions. [2021-07-13 20:35:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:32,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:32,366 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:32,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2988 [2021-07-13 20:35:32,573 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-07-13 20:35:32,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:32,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114663970] [2021-07-13 20:35:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:32,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:32,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114663970] [2021-07-13 20:35:32,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114663970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:32,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388083646] [2021-07-13 20:35:32,914 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:32,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:32,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:32,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:35:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:33,375 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:35:33,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,670 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:35:33,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-13 20:35:33,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,702 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:35:33,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:35:33,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:34,134 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-07-13 20:35:34,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,173 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:35:34,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:35:34,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:34,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,205 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:35:34,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:35:34,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:34,564 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-13 20:35:34,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,598 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:35:34,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:35:34,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,637 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:35:34,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:35:34,641 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:34,963 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-13 20:35:34,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:34,993 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:35:34,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-13 20:35:34,995 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:35,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:35,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:35:35,025 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:35,341 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:35:35,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:35,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:35,380 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:35:35,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-07-13 20:35:35,381 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:35,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:35,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:35,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-13 20:35:35,415 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:35,988 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2021-07-13 20:35:35,989 INFO L628 ElimStorePlain]: treesize reduction 33, result has 94.4 percent of original size [2021-07-13 20:35:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,048 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:35:36,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:35:36,053 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,064 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:35:36,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:35:36,065 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,301 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:35:36,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,333 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:35:36,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-13 20:35:36,337 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,358 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:35:36,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-13 20:35:36,360 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,576 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:35:36,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,606 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:35:36,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:35:36,610 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:36,621 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:35:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:35:36,622 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,797 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:35:36,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:36,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-13 20:35:36,816 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:340 [2021-07-13 20:35:36,948 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-07-13 20:35:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:36,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388083646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:36,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:36,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:35:36,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208535451] [2021-07-13 20:35:36,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:36,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:36,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:36,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:36,997 INFO L87 Difference]: Start difference. First operand 1906 states and 6450 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:38,138 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:35:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:38,467 INFO L93 Difference]: Finished difference Result 2168 states and 7234 transitions. [2021-07-13 20:35:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:35:38,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:38,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:38,471 INFO L225 Difference]: With dead ends: 2168 [2021-07-13 20:35:38,471 INFO L226 Difference]: Without dead ends: 2153 [2021-07-13 20:35:38,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1707.5ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:35:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-07-13 20:35:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1921. [2021-07-13 20:35:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.3921875) internal successors, (6513), 1920 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6513 transitions. [2021-07-13 20:35:38,500 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6513 transitions. Word has length 26 [2021-07-13 20:35:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:38,500 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6513 transitions. [2021-07-13 20:35:38,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6513 transitions. [2021-07-13 20:35:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:38,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:38,503 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:38,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:38,717 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-07-13 20:35:38,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:38,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603596299] [2021-07-13 20:35:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:39,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:39,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603596299] [2021-07-13 20:35:39,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603596299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:39,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944520547] [2021-07-13 20:35:39,133 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:35:39,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:39,442 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:35:39,614 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:35:40,075 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-07-13 20:35:40,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:40,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:40,151 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 28 treesize of output 16 [2021-07-13 20:35:40,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:40,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:40,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:40,156 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 33 treesize of output 19 [2021-07-13 20:35:40,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:40,270 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 20:35:40,270 INFO L628 ElimStorePlain]: treesize reduction 44, result has 75.1 percent of original size [2021-07-13 20:35:40,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:40,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:40,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:40,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:40,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:40,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:40,349 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 28 treesize of output 16 [2021-07-13 20:35:40,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:40,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:40,354 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 21 treesize of output 13 [2021-07-13 20:35:40,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:40,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:40,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:40,421 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-07-13 20:35:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:40,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944520547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:40,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:40,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:40,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460770500] [2021-07-13 20:35:40,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:40,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:40,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:40,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:40,496 INFO L87 Difference]: Start difference. First operand 1921 states and 6513 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:41,197 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-13 20:35:41,856 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2021-07-13 20:35:42,312 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-07-13 20:35:42,878 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-07-13 20:35:43,391 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 92 [2021-07-13 20:35:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:43,618 INFO L93 Difference]: Finished difference Result 2468 states and 8139 transitions. [2021-07-13 20:35:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:35:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:35:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:43,623 INFO L225 Difference]: With dead ends: 2468 [2021-07-13 20:35:43,623 INFO L226 Difference]: Without dead ends: 2453 [2021-07-13 20:35:43,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3738.8ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:35:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-07-13 20:35:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1932. [2021-07-13 20:35:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.392542723977214) internal successors, (6551), 1931 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6551 transitions. [2021-07-13 20:35:43,648 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6551 transitions. Word has length 26 [2021-07-13 20:35:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:43,648 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6551 transitions. [2021-07-13 20:35:43,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6551 transitions. [2021-07-13 20:35:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:43,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:43,651 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:43,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-13 20:35:43,867 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-07-13 20:35:43,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:43,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565319247] [2021-07-13 20:35:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:44,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:44,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565319247] [2021-07-13 20:35:44,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565319247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:44,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718954267] [2021-07-13 20:35:44,154 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:44,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:44,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:44,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:35:44,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:44,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:35:44,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:35:44,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:35:44,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:35:44,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:44,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:35:44,764 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:35:44,772 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:35:44,779 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:35:44,786 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:44,794 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:35:44,801 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:44,809 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:35:44,817 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:35:44,824 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:44,829 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,858 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-13 20:35:44,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:44,859 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:35:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:44,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718954267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:44,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:44,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:35:44,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003686807] [2021-07-13 20:35:44,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:35:44,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:44,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:35:44,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:35:44,878 INFO L87 Difference]: Start difference. First operand 1932 states and 6551 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:45,271 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-13 20:35:45,514 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 20:35:45,760 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-13 20:35:46,087 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-13 20:35:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:46,390 INFO L93 Difference]: Finished difference Result 2505 states and 8099 transitions. [2021-07-13 20:35:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:35:46,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-07-13 20:35:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:46,395 INFO L225 Difference]: With dead ends: 2505 [2021-07-13 20:35:46,395 INFO L226 Difference]: Without dead ends: 2483 [2021-07-13 20:35:46,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1562.0ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:35:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-07-13 20:35:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1948. [2021-07-13 20:35:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.3954802259887007) internal successors, (6611), 1947 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6611 transitions. [2021-07-13 20:35:46,455 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6611 transitions. Word has length 26 [2021-07-13 20:35:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:46,455 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6611 transitions. [2021-07-13 20:35:46,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6611 transitions. [2021-07-13 20:35:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:46,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:46,458 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:46,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:46,674 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:46,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-07-13 20:35:46,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:46,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730089186] [2021-07-13 20:35:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:47,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:47,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730089186] [2021-07-13 20:35:47,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730089186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:47,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496567361] [2021-07-13 20:35:47,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:47,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:47,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:47,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:35:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:47,655 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:35:47,973 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:35:48,121 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_421, v_prenex_422, v_prenex_425], 6=[v_prenex_426, A, v_prenex_420, v_prenex_423, v_prenex_424]} [2021-07-13 20:35:48,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:48,142 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:35:48,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:48,567 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 136 [2021-07-13 20:35:48,568 INFO L628 ElimStorePlain]: treesize reduction 307, result has 56.1 percent of original size [2021-07-13 20:35:48,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:48,587 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:35:48,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:48,752 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-13 20:35:48,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:48,775 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:48,775 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:35:48,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:48,931 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:35:48,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:48,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:48,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:48,951 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-13 20:35:48,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:49,110 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:35:49,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:49,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:49,134 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:35:49,135 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-13 20:35:49,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:49,295 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:35:49,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:49,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:49,316 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:35:49,316 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:35:49,318 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:49,463 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:35:49,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:49,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:49,484 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:35:49,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:35:49,488 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:49,627 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-13 20:35:49,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:49,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:49,646 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:35:49,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:35:49,647 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:49,785 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:35:49,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:49,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:49,800 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:706, output treesize:429 [2021-07-13 20:35:50,042 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-13 20:35:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:50,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496567361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:50,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:50,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:35:50,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454821353] [2021-07-13 20:35:50,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:50,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:50,164 INFO L87 Difference]: Start difference. First operand 1948 states and 6611 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:51,141 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-07-13 20:35:51,693 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-07-13 20:35:51,964 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-13 20:35:52,711 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2021-07-13 20:35:53,593 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2021-07-13 20:35:54,425 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2021-07-13 20:35:55,023 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 105 [2021-07-13 20:35:55,947 WARN L205 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-07-13 20:35:56,458 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2021-07-13 20:35:57,146 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 101 [2021-07-13 20:35:57,385 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-07-13 20:35:57,598 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-07-13 20:35:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:57,867 INFO L93 Difference]: Finished difference Result 2657 states and 8685 transitions. [2021-07-13 20:35:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:35:57,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:57,872 INFO L225 Difference]: With dead ends: 2657 [2021-07-13 20:35:57,872 INFO L226 Difference]: Without dead ends: 2642 [2021-07-13 20:35:57,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 7911.4ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:35:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-07-13 20:35:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1952. [2021-07-13 20:35:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 3.3956945156330085) internal successors, (6625), 1951 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) [2021-07-13 20:35:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 6625 transitions. [2021-07-13 20:35:57,899 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 6625 transitions. Word has length 26 [2021-07-13 20:35:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:57,899 INFO L482 AbstractCegarLoop]: Abstraction has 1952 states and 6625 transitions. [2021-07-13 20:35:57,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 6625 transitions. [2021-07-13 20:35:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:57,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:57,902 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:58,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3193,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:58,105 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 51 times [2021-07-13 20:35:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:58,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211503173] [2021-07-13 20:35:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:58,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211503173] [2021-07-13 20:35:58,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211503173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137142275] [2021-07-13 20:35:58,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:58,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:58,747 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:35:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:58,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:58,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:58,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,915 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:58,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:35:58,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:35:59,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,124 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:59,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:59,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:35:59,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:59,322 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:59,416 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,513 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:59,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:59,515 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:59,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:59,609 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:35:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:59,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137142275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:59,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:59,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:59,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862742716] [2021-07-13 20:35:59,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:59,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:59,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:59,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:59,791 INFO L87 Difference]: Start difference. First operand 1952 states and 6625 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:00,935 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-07-13 20:36:01,229 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 20:36:01,372 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-07-13 20:36:01,723 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-07-13 20:36:01,970 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-07-13 20:36:02,179 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-13 20:36:02,405 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-07-13 20:36:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:02,546 INFO L93 Difference]: Finished difference Result 2972 states and 9683 transitions. [2021-07-13 20:36:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:36:02,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:36:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:02,551 INFO L225 Difference]: With dead ends: 2972 [2021-07-13 20:36:02,551 INFO L226 Difference]: Without dead ends: 2942 [2021-07-13 20:36:02,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2743.5ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:36:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-07-13 20:36:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1949. [2021-07-13 20:36:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.3983572895277208) internal successors, (6620), 1948 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6620 transitions. [2021-07-13 20:36:02,582 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6620 transitions. Word has length 26 [2021-07-13 20:36:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:02,582 INFO L482 AbstractCegarLoop]: Abstraction has 1949 states and 6620 transitions. [2021-07-13 20:36:02,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6620 transitions. [2021-07-13 20:36:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:02,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:02,585 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:02,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-07-13 20:36:02,801 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-07-13 20:36:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:02,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397913665] [2021-07-13 20:36:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:03,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:03,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397913665] [2021-07-13 20:36:03,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397913665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:03,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201124969] [2021-07-13 20:36:03,109 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:03,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:36:03,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:03,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:36:03,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:36:03,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:36:03,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:36:03,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:36:03,642 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:36:03,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:03,658 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:03,666 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:03,674 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:36:03,682 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:36:03,690 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:36:03,699 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:03,707 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:36:03,716 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:03,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:03,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:36:03,721 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,749 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-13 20:36:03,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:03,750 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:36:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:03,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201124969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:03,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:03,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:36:03,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156746685] [2021-07-13 20:36:03,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:03,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:03,785 INFO L87 Difference]: Start difference. First operand 1949 states and 6620 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:04,650 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-07-13 20:36:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:05,086 INFO L93 Difference]: Finished difference Result 3403 states and 10936 transitions. [2021-07-13 20:36:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:36:05,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-07-13 20:36:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:05,091 INFO L225 Difference]: With dead ends: 3403 [2021-07-13 20:36:05,091 INFO L226 Difference]: Without dead ends: 3373 [2021-07-13 20:36:05,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1374.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:36:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-07-13 20:36:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 2041. [2021-07-13 20:36:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4073529411764705) internal successors, (6951), 2040 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6951 transitions. [2021-07-13 20:36:05,125 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6951 transitions. Word has length 26 [2021-07-13 20:36:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:05,125 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 6951 transitions. [2021-07-13 20:36:05,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6951 transitions. [2021-07-13 20:36:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:05,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:05,128 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:05,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:05,344 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-07-13 20:36:05,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:05,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760453145] [2021-07-13 20:36:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:05,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:05,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760453145] [2021-07-13 20:36:05,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760453145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:05,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440907384] [2021-07-13 20:36:05,596 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:05,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:36:05,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:05,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,128 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-13 20:36:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 41 [2021-07-13 20:36:06,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:06,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-07-13 20:36:06,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,206 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-13 20:36:06,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-07-13 20:36:06,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,229 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:36:06,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:36:06,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,248 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:36:06,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:36:06,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,313 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-13 20:36:06,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 28 [2021-07-13 20:36:06,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,333 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:36:06,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:36:06,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:06,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:36:06,374 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,408 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-13 20:36:06,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:36:06,412 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,430 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:36:06,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:36:06,431 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,458 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-13 20:36:06,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 25 [2021-07-13 20:36:06,459 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,487 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-13 20:36:06,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 25 [2021-07-13 20:36:06,488 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,507 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:36:06,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 1 [2021-07-13 20:36:06,508 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,525 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:36:06,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:36:06,526 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,542 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:36:06,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-13 20:36:06,543 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:06,553 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:36:06,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:36:06,554 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,762 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-07-13 20:36:06,762 INFO L628 ElimStorePlain]: treesize reduction 193, result has 41.2 percent of original size [2021-07-13 20:36:06,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:36:06,766 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:150 [2021-07-13 20:36:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:06,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440907384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:06,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:06,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:36:06,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846757151] [2021-07-13 20:36:06,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:06,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:06,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:06,977 INFO L87 Difference]: Start difference. First operand 2041 states and 6951 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:08,791 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 20:36:09,045 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-07-13 20:36:09,384 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-07-13 20:36:09,558 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-07-13 20:36:09,863 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-07-13 20:36:10,032 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-07-13 20:36:10,235 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-13 20:36:10,594 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-07-13 20:36:10,746 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-07-13 20:36:10,920 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:36:11,392 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-13 20:36:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:11,573 INFO L93 Difference]: Finished difference Result 3293 states and 10339 transitions. [2021-07-13 20:36:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:36:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:11,579 INFO L225 Difference]: With dead ends: 3293 [2021-07-13 20:36:11,579 INFO L226 Difference]: Without dead ends: 3220 [2021-07-13 20:36:11,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4449.2ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:36:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-07-13 20:36:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2049. [2021-07-13 20:36:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-07-13 20:36:11,610 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-07-13 20:36:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:11,610 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-07-13 20:36:11,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-07-13 20:36:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:11,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:11,613 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:11,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-07-13 20:36:11,829 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash -272116042, now seen corresponding path program 52 times [2021-07-13 20:36:11,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:11,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896930993] [2021-07-13 20:36:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:12,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:12,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896930993] [2021-07-13 20:36:12,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896930993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:12,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439080261] [2021-07-13 20:36:12,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:12,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:12,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:12,646 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:36:12,745 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_460, v_prenex_455, v_prenex_457], 6=[A, v_prenex_450, v_prenex_453, v_prenex_444, v_prenex_446]} [2021-07-13 20:36:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:12,774 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:12,774 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:36:12,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:13,150 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2021-07-13 20:36:13,151 INFO L628 ElimStorePlain]: treesize reduction 283, result has 56.5 percent of original size [2021-07-13 20:36:13,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:13,176 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:13,176 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:36:13,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:13,320 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-07-13 20:36:13,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:13,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:13,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:13,341 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:36:13,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:13,665 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2021-07-13 20:36:13,666 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-07-13 20:36:13,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:13,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:13,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:36:13,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:13,959 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 140 [2021-07-13 20:36:13,959 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-07-13 20:36:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:13,979 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:13,979 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:36:13,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,116 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-07-13 20:36:14,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:14,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,137 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:36:14,142 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,264 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:36:14,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:14,286 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:14,286 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:36:14,289 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,404 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:36:14,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:14,423 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:14,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:14,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,538 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:36:14,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:14,556 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:658, output treesize:346 [2021-07-13 20:36:14,763 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-13 20:36:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:14,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439080261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:14,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:14,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:14,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787028264] [2021-07-13 20:36:14,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:14,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:14,862 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:16,084 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-13 20:36:16,562 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-13 20:36:16,770 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:36:17,130 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-07-13 20:36:17,416 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2021-07-13 20:36:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:17,481 INFO L93 Difference]: Finished difference Result 2966 states and 9810 transitions. [2021-07-13 20:36:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:36:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:36:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:17,487 INFO L225 Difference]: With dead ends: 2966 [2021-07-13 20:36:17,487 INFO L226 Difference]: Without dead ends: 2951 [2021-07-13 20:36:17,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3013.4ms TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:36:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-13 20:36:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2061. [2021-07-13 20:36:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-07-13 20:36:17,524 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-07-13 20:36:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:17,524 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-07-13 20:36:17,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:17,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-07-13 20:36:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:17,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:17,528 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:17,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:17,741 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 53 times [2021-07-13 20:36:17,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:17,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127356216] [2021-07-13 20:36:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:18,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:18,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127356216] [2021-07-13 20:36:18,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127356216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:18,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113487746] [2021-07-13 20:36:18,073 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:18,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:36:18,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:18,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:36:18,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:18,622 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-13 20:36:18,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:18,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:18,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:36:18,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:18,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:18,735 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:18,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:18,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:18,866 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:36:18,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:18,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:18,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:18,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:18,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:18,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:18,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:18,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:18,994 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:36:18,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:18,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:19,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:36:19,007 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,015 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:19,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:19,017 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,124 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:19,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:36:19,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:19,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:19,136 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:19,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:19,231 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-07-13 20:36:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:19,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113487746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:19,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:19,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:36:19,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58230544] [2021-07-13 20:36:19,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:19,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:19,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:19,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:19,404 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:19,942 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-13 20:36:20,143 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-13 20:36:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:20,691 INFO L93 Difference]: Finished difference Result 2612 states and 8738 transitions. [2021-07-13 20:36:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:36:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:36:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:20,696 INFO L225 Difference]: With dead ends: 2612 [2021-07-13 20:36:20,696 INFO L226 Difference]: Without dead ends: 2587 [2021-07-13 20:36:20,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1649.9ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:36:20,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-07-13 20:36:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2061. [2021-07-13 20:36:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-07-13 20:36:20,724 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-07-13 20:36:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:20,724 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-07-13 20:36:20,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-07-13 20:36:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:20,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:20,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:20,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:20,943 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:20,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1086187700, now seen corresponding path program 54 times [2021-07-13 20:36:20,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:20,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433046535] [2021-07-13 20:36:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:21,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:21,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433046535] [2021-07-13 20:36:21,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433046535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:21,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973434938] [2021-07-13 20:36:21,371 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:21,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:36:21,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:21,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,611 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:21,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:21,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,620 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:21,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:21,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,633 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:21,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:21,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,643 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:21,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:21,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,655 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:21,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:21,656 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:21,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:21,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,674 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:21,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:21,674 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:21,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:36:21,685 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:21,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:36:21,697 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,704 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:21,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:36:21,705 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,712 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:21,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:36:21,713 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:21,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:21,724 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,733 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:21,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:36:21,734 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:21,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:21,746 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,753 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:21,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:21,754 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:21,758 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:21,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:21,759 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:21,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:21,829 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:36:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:22,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973434938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:22,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:22,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:36:22,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321188585] [2021-07-13 20:36:22,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:22,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:22,010 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:23,296 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-13 20:36:23,555 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-07-13 20:36:23,731 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-13 20:36:23,989 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:36:24,315 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-13 20:36:24,606 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-07-13 20:36:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:24,667 INFO L93 Difference]: Finished difference Result 2664 states and 8880 transitions. [2021-07-13 20:36:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:36:24,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:36:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:24,673 INFO L225 Difference]: With dead ends: 2664 [2021-07-13 20:36:24,673 INFO L226 Difference]: Without dead ends: 2649 [2021-07-13 20:36:24,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2765.9ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:36:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-07-13 20:36:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2049. [2021-07-13 20:36:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-07-13 20:36:24,713 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-07-13 20:36:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:24,713 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-07-13 20:36:24,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:24,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-07-13 20:36:24,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:24,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:24,717 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:24,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:24,933 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-07-13 20:36:24,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:24,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035110865] [2021-07-13 20:36:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:25,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035110865] [2021-07-13 20:36:25,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035110865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361358505] [2021-07-13 20:36:25,309 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:25,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:25,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:25,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:25,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:36:25,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:25,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:36:25,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:25,798 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:36:25,805 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:36:25,813 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:36:25,821 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:36:25,829 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:36:25,836 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:36:25,844 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:36:25,851 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:36:25,858 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:36:25,862 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,889 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-13 20:36:25,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:25,890 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:36:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:25,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361358505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:25,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:25,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:36:25,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311624114] [2021-07-13 20:36:25,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:36:25,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:36:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:36:25,910 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:28,196 INFO L93 Difference]: Finished difference Result 2625 states and 8625 transitions. [2021-07-13 20:36:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:36:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 26 [2021-07-13 20:36:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:28,201 INFO L225 Difference]: With dead ends: 2625 [2021-07-13 20:36:28,201 INFO L226 Difference]: Without dead ends: 2603 [2021-07-13 20:36:28,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2326.2ms TimeCoverageRelationStatistics Valid=525, Invalid=2127, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:36:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-13 20:36:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2047. [2021-07-13 20:36:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.40811339198436) internal successors, (6973), 2046 states have internal predecessors, (6973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 6973 transitions. [2021-07-13 20:36:28,232 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 6973 transitions. Word has length 26 [2021-07-13 20:36:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:28,232 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 6973 transitions. [2021-07-13 20:36:28,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 6973 transitions. [2021-07-13 20:36:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:28,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:28,234 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:28,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-07-13 20:36:28,450 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-07-13 20:36:28,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:28,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896175170] [2021-07-13 20:36:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:28,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:28,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896175170] [2021-07-13 20:36:28,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896175170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:28,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561507301] [2021-07-13 20:36:28,733 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:28,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:28,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:29,072 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:36:29,147 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_470], 6=[v_prenex_472, v_prenex_474]} [2021-07-13 20:36:29,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:29,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:29,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:29,154 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 27 treesize of output 13 [2021-07-13 20:36:29,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:29,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:29,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:29,159 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 20 treesize of output 7 [2021-07-13 20:36:29,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:29,256 INFO L628 ElimStorePlain]: treesize reduction 162, result has 46.2 percent of original size [2021-07-13 20:36:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:29,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:29,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:29,261 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 25 treesize of output 13 [2021-07-13 20:36:29,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:29,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:29,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:29,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:29,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:29,298 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 29 treesize of output 13 [2021-07-13 20:36:29,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:29,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:29,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:29,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:29,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:29,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:29,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:36:29,332 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:29,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:29,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:36:29,359 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-07-13 20:36:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:29,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561507301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:29,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:29,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:36:29,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351202839] [2021-07-13 20:36:29,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:29,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:29,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:29,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:29,401 INFO L87 Difference]: Start difference. First operand 2047 states and 6973 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:30,707 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:36:30,965 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-13 20:36:31,110 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-13 20:36:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:31,237 INFO L93 Difference]: Finished difference Result 2959 states and 9765 transitions. [2021-07-13 20:36:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:36:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-07-13 20:36:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:31,242 INFO L225 Difference]: With dead ends: 2959 [2021-07-13 20:36:31,242 INFO L226 Difference]: Without dead ends: 2919 [2021-07-13 20:36:31,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1862.0ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:36:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-07-13 20:36:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2063. [2021-07-13 20:36:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.41270611057226) internal successors, (7037), 2062 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7037 transitions. [2021-07-13 20:36:31,271 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7037 transitions. Word has length 26 [2021-07-13 20:36:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:31,272 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7037 transitions. [2021-07-13 20:36:31,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7037 transitions. [2021-07-13 20:36:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:31,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:31,274 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:31,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:31,489 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-07-13 20:36:31,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:31,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879522132] [2021-07-13 20:36:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:31,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:31,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879522132] [2021-07-13 20:36:31,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879522132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326790434] [2021-07-13 20:36:31,779 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:31,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:31,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:31,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:32,188 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-13 20:36:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:32,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:32,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:36:32,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:32,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:32,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:32,430 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-13 20:36:32,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 39 [2021-07-13 20:36:32,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:33,588 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2021-07-13 20:36:33,589 INFO L628 ElimStorePlain]: treesize reduction 42, result has 95.5 percent of original size [2021-07-13 20:36:33,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:33,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:33,650 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-07-13 20:36:33,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:36:33,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:33,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:33,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:33,708 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-13 20:36:33,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 47 [2021-07-13 20:36:33,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:34,816 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 188 DAG size of output: 183 [2021-07-13 20:36:34,817 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.4 percent of original size [2021-07-13 20:36:34,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:34,858 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-13 20:36:34,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:36:34,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:34,896 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-13 20:36:34,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:36:34,899 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:35,889 WARN L205 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2021-07-13 20:36:35,889 INFO L628 ElimStorePlain]: treesize reduction 44, result has 94.9 percent of original size [2021-07-13 20:36:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:35,934 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-07-13 20:36:35,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:36:35,936 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:35,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:35,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:35,972 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-07-13 20:36:35,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:36:35,974 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:36,484 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-13 20:36:36,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:36,533 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-13 20:36:36,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 39 [2021-07-13 20:36:36,538 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:36,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:36,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:36,578 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-13 20:36:36,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2021-07-13 20:36:36,583 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,540 WARN L205 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2021-07-13 20:36:37,541 INFO L628 ElimStorePlain]: treesize reduction 18, result has 97.7 percent of original size [2021-07-13 20:36:37,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,593 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-13 20:36:37,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:36:37,599 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:37,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-13 20:36:37,640 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:38,086 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-07-13 20:36:38,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:38,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,129 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-13 20:36:38,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:36:38,132 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,168 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-13 20:36:38,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:36:38,170 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:39,006 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-07-13 20:36:39,006 INFO L628 ElimStorePlain]: treesize reduction 11, result has 98.4 percent of original size [2021-07-13 20:36:39,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:39,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:39,067 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-07-13 20:36:39,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 43 [2021-07-13 20:36:39,071 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:39,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:39,118 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-13 20:36:39,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 36 [2021-07-13 20:36:39,123 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:39,525 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:36:39,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:39,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-13 20:36:39,571 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:945, output treesize:1467 [2021-07-13 20:36:39,979 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-07-13 20:36:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:40,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326790434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:40,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:40,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:36:40,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360902985] [2021-07-13 20:36:40,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:40,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:40,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:40,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:40,078 INFO L87 Difference]: Start difference. First operand 2063 states and 7037 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:40,651 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2021-07-13 20:36:40,866 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2021-07-13 20:36:41,274 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-07-13 20:36:41,784 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-13 20:36:41,944 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-07-13 20:36:42,254 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-07-13 20:36:42,706 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-13 20:36:42,924 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-07-13 20:36:43,113 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-07-13 20:36:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:43,183 INFO L93 Difference]: Finished difference Result 2842 states and 9205 transitions. [2021-07-13 20:36:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:36:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 26 [2021-07-13 20:36:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:43,188 INFO L225 Difference]: With dead ends: 2842 [2021-07-13 20:36:43,188 INFO L226 Difference]: Without dead ends: 2798 [2021-07-13 20:36:43,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3659.2ms TimeCoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:36:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-07-13 20:36:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2136. [2021-07-13 20:36:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.406088992974239) internal successors, (7272), 2135 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7272 transitions. [2021-07-13 20:36:43,218 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7272 transitions. Word has length 26 [2021-07-13 20:36:43,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:43,218 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 7272 transitions. [2021-07-13 20:36:43,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7272 transitions. [2021-07-13 20:36:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:43,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:43,221 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:43,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:43,437 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash -550813574, now seen corresponding path program 55 times [2021-07-13 20:36:43,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:43,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396499370] [2021-07-13 20:36:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:43,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:43,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396499370] [2021-07-13 20:36:43,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396499370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:43,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530968989] [2021-07-13 20:36:43,841 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:44,335 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-13 20:36:44,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,447 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:44,447 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:36:44,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:44,471 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:36:44,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,808 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 147 [2021-07-13 20:36:44,809 INFO L628 ElimStorePlain]: treesize reduction 194, result has 64.3 percent of original size [2021-07-13 20:36:44,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,833 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:44,833 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:36:44,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:44,971 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-07-13 20:36:44,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:44,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:44,993 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:44,993 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:36:44,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:45,124 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-07-13 20:36:45,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:45,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:45,148 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:45,148 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:36:45,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:45,276 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-07-13 20:36:45,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:45,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:45,299 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:45,300 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:36:45,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:45,427 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-13 20:36:45,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:45,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:45,448 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:45,449 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:45,450 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:45,575 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-13 20:36:45,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:45,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:45,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:45,593 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:36:45,598 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:45,832 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-07-13 20:36:45,833 INFO L628 ElimStorePlain]: treesize reduction 12, result has 95.8 percent of original size [2021-07-13 20:36:45,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:45,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:45,850 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:36:45,853 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:46,101 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2021-07-13 20:36:46,101 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-07-13 20:36:46,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:46,118 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:583, output treesize:253 [2021-07-13 20:36:46,301 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 20:36:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:46,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530968989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:46,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:46,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:46,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808121714] [2021-07-13 20:36:46,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:46,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:46,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:46,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:46,398 INFO L87 Difference]: Start difference. First operand 2136 states and 7272 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:47,485 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-07-13 20:36:47,704 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 20:36:47,918 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:36:48,329 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-07-13 20:36:48,678 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-13 20:36:48,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:48,735 INFO L93 Difference]: Finished difference Result 3051 states and 10102 transitions. [2021-07-13 20:36:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:36:48,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:36:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:48,741 INFO L225 Difference]: With dead ends: 3051 [2021-07-13 20:36:48,741 INFO L226 Difference]: Without dead ends: 3036 [2021-07-13 20:36:48,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2857.8ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:36:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-07-13 20:36:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2138. [2021-07-13 20:36:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 3.402433317735143) internal successors, (7271), 2137 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 7271 transitions. [2021-07-13 20:36:48,782 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 7271 transitions. Word has length 26 [2021-07-13 20:36:48,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:48,782 INFO L482 AbstractCegarLoop]: Abstraction has 2138 states and 7271 transitions. [2021-07-13 20:36:48,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:48,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 7271 transitions. [2021-07-13 20:36:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:48,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:48,786 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:49,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3761,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:49,008 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 56 times [2021-07-13 20:36:49,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:49,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047497532] [2021-07-13 20:36:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:49,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:49,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047497532] [2021-07-13 20:36:49,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047497532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:49,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459399746] [2021-07-13 20:36:49,423 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:49,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:49,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:49,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:49,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:49,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,645 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:49,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:49,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,653 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:49,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:36:49,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,663 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:49,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:49,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,672 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:49,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:49,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,683 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:49,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:49,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:49,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:49,695 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:49,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:49,703 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:49,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:36:49,714 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:49,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:36:49,726 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,733 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:49,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:36:49,734 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,742 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:49,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-13 20:36:49,743 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:49,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:49,755 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,764 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:49,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:36:49,766 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:49,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:49,777 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,784 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:49,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:49,784 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,789 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:49,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:36:49,789 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:49,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:49,852 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:36:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:50,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459399746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:50,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:50,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:36:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325776038] [2021-07-13 20:36:50,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:50,029 INFO L87 Difference]: Start difference. First operand 2138 states and 7271 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:50,306 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-13 20:36:51,124 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-13 20:36:51,301 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:36:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:51,379 INFO L93 Difference]: Finished difference Result 2900 states and 9631 transitions. [2021-07-13 20:36:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:36:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-07-13 20:36:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:51,384 INFO L225 Difference]: With dead ends: 2900 [2021-07-13 20:36:51,385 INFO L226 Difference]: Without dead ends: 2875 [2021-07-13 20:36:51,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1595.3ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:36:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-07-13 20:36:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2131. [2021-07-13 20:36:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.3995305164319247) internal successors, (7241), 2130 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7241 transitions. [2021-07-13 20:36:51,417 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7241 transitions. Word has length 26 [2021-07-13 20:36:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:51,417 INFO L482 AbstractCegarLoop]: Abstraction has 2131 states and 7241 transitions. [2021-07-13 20:36:51,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7241 transitions. [2021-07-13 20:36:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:51,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:51,420 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:51,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:51,633 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash 807490168, now seen corresponding path program 57 times [2021-07-13 20:36:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:51,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396199510] [2021-07-13 20:36:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:52,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:52,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396199510] [2021-07-13 20:36:52,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396199510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:52,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419706316] [2021-07-13 20:36:52,011 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:52,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:52,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:52,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:52,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:52,552 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-13 20:36:52,899 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2021-07-13 20:36:53,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:53,036 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 28 treesize of output 16 [2021-07-13 20:36:53,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:53,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,041 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 33 treesize of output 19 [2021-07-13 20:36:53,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,194 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-07-13 20:36:53,195 INFO L628 ElimStorePlain]: treesize reduction 143, result has 51.5 percent of original size [2021-07-13 20:36:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:36:53,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:53,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:53,262 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 21 treesize of output 13 [2021-07-13 20:36:53,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:53,275 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 28 treesize of output 16 [2021-07-13 20:36:53,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:53,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:53,367 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:333, output treesize:51 [2021-07-13 20:36:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:53,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419706316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:53,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:53,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:53,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819950781] [2021-07-13 20:36:53,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:53,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:53,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:53,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:53,415 INFO L87 Difference]: Start difference. First operand 2131 states and 7241 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:54,075 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-07-13 20:36:54,422 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:36:54,838 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-07-13 20:36:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:54,949 INFO L93 Difference]: Finished difference Result 2671 states and 8927 transitions. [2021-07-13 20:36:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:36:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:36:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:54,955 INFO L225 Difference]: With dead ends: 2671 [2021-07-13 20:36:54,955 INFO L226 Difference]: Without dead ends: 2656 [2021-07-13 20:36:54,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2118.5ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:36:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-07-13 20:36:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2119. [2021-07-13 20:36:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.4022662889518416) internal successors, (7206), 2118 states have internal predecessors, (7206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7206 transitions. [2021-07-13 20:36:54,986 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7206 transitions. Word has length 26 [2021-07-13 20:36:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:54,986 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7206 transitions. [2021-07-13 20:36:54,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7206 transitions. [2021-07-13 20:36:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:54,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:54,989 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:55,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3819 [2021-07-13 20:36:55,206 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:55,206 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-07-13 20:36:55,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:55,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820282169] [2021-07-13 20:36:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:55,422 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-07-13 20:36:55,545 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-07-13 20:36:55,715 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-13 20:36:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:55,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:55,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820282169] [2021-07-13 20:36:55,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820282169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:55,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486660528] [2021-07-13 20:36:55,817 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:55,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:55,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:36:55,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:56,160 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-13 20:36:56,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,266 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:56,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:36:56,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:56,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,413 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:36:56,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,428 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:56,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:56,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:36:56,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,555 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:36:56,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,568 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:56,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:56,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:36:56,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,686 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:36:56,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:56,699 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:56,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:56,710 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:56,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:56,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:56,812 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-07-13 20:36:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:57,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486660528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:57,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:57,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:57,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670280014] [2021-07-13 20:36:57,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:57,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:57,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:57,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:57,001 INFO L87 Difference]: Start difference. First operand 2119 states and 7206 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:57,938 INFO L93 Difference]: Finished difference Result 2740 states and 9175 transitions. [2021-07-13 20:36:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:36:57,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-07-13 20:36:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:57,943 INFO L225 Difference]: With dead ends: 2740 [2021-07-13 20:36:57,943 INFO L226 Difference]: Without dead ends: 2725 [2021-07-13 20:36:57,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1526.4ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:36:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-07-13 20:36:57,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2113. [2021-07-13 20:36:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.403409090909091) internal successors, (7188), 2112 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 7188 transitions. [2021-07-13 20:36:57,973 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 7188 transitions. Word has length 26 [2021-07-13 20:36:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:57,973 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 7188 transitions. [2021-07-13 20:36:57,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 7188 transitions. [2021-07-13 20:36:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:57,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:57,976 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:58,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3838 [2021-07-13 20:36:58,192 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1128807410, now seen corresponding path program 64 times [2021-07-13 20:36:58,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:58,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357575203] [2021-07-13 20:36:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:58,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:58,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357575203] [2021-07-13 20:36:58,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357575203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:58,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305747306] [2021-07-13 20:36:58,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:58,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:58,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:58,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:58,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:59,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:59,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:36:59,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:36:59,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:36:59,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:36:59,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:36:59,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:36:59,063 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:36:59,070 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:36:59,078 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:59,085 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:36:59,092 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:36:59,100 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:59,107 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:59,114 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:59,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:36:59,119 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,147 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-13 20:36:59,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:59,149 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:36:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:59,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305747306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:59,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:59,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:36:59,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897695315] [2021-07-13 20:36:59,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:59,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:59,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:59,184 INFO L87 Difference]: Start difference. First operand 2113 states and 7188 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:00,641 INFO L93 Difference]: Finished difference Result 2992 states and 9892 transitions. [2021-07-13 20:37:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:37:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-07-13 20:37:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:00,646 INFO L225 Difference]: With dead ends: 2992 [2021-07-13 20:37:00,646 INFO L226 Difference]: Without dead ends: 2955 [2021-07-13 20:37:00,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1492.6ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:37:00,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-07-13 20:37:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2104. [2021-07-13 20:37:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.4013314312886354) internal successors, (7153), 2103 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 7153 transitions. [2021-07-13 20:37:00,677 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 7153 transitions. Word has length 26 [2021-07-13 20:37:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:00,677 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 7153 transitions. [2021-07-13 20:37:00,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 7153 transitions. [2021-07-13 20:37:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:00,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:00,680 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:00,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3871,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:00,896 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:00,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-07-13 20:37:00,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:00,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284257763] [2021-07-13 20:37:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:00,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:00,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284257763] [2021-07-13 20:37:00,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284257763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:00,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155441636] [2021-07-13 20:37:00,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:00,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:37:00,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:00,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:01,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155441636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:01,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:01,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:37:01,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952664437] [2021-07-13 20:37:01,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:37:01,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:01,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:37:01,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:01,040 INFO L87 Difference]: Start difference. First operand 2104 states and 7153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:01,960 INFO L93 Difference]: Finished difference Result 5069 states and 15729 transitions. [2021-07-13 20:37:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:37:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-07-13 20:37:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:01,968 INFO L225 Difference]: With dead ends: 5069 [2021-07-13 20:37:01,969 INFO L226 Difference]: Without dead ends: 5069 [2021-07-13 20:37:01,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:37:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-07-13 20:37:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 2297. [2021-07-13 20:37:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2296 states have (on average 3.451219512195122) internal successors, (7924), 2296 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 7924 transitions. [2021-07-13 20:37:02,017 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 7924 transitions. Word has length 28 [2021-07-13 20:37:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:02,018 INFO L482 AbstractCegarLoop]: Abstraction has 2297 states and 7924 transitions. [2021-07-13 20:37:02,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 7924 transitions. [2021-07-13 20:37:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:02,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:02,021 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:02,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:02,237 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:02,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-07-13 20:37:02,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:02,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934933391] [2021-07-13 20:37:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:02,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:02,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934933391] [2021-07-13 20:37:02,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934933391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:02,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725736826] [2021-07-13 20:37:02,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:02,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:37:02,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:02,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:02,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:02,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725736826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:02,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:02,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:37:02,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565592486] [2021-07-13 20:37:02,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:37:02,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:02,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:37:02,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:02,419 INFO L87 Difference]: Start difference. First operand 2297 states and 7924 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:03,686 INFO L93 Difference]: Finished difference Result 6700 states and 20456 transitions. [2021-07-13 20:37:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:37:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-07-13 20:37:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:03,696 INFO L225 Difference]: With dead ends: 6700 [2021-07-13 20:37:03,696 INFO L226 Difference]: Without dead ends: 6700 [2021-07-13 20:37:03,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:37:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-07-13 20:37:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 2308. [2021-07-13 20:37:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 3.4581707845687037) internal successors, (7978), 2307 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 7978 transitions. [2021-07-13 20:37:03,749 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 7978 transitions. Word has length 28 [2021-07-13 20:37:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:03,749 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 7978 transitions. [2021-07-13 20:37:03,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 7978 transitions. [2021-07-13 20:37:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:03,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:03,753 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:03,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:03,970 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:03,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-07-13 20:37:03,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:03,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534281013] [2021-07-13 20:37:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:04,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:04,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534281013] [2021-07-13 20:37:04,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534281013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:04,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90438242] [2021-07-13 20:37:04,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:04,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:04,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90438242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:04,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:04,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:37:04,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025189759] [2021-07-13 20:37:04,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:37:04,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:04,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:37:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:04,154 INFO L87 Difference]: Start difference. First operand 2308 states and 7978 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:05,362 INFO L93 Difference]: Finished difference Result 6089 states and 18976 transitions. [2021-07-13 20:37:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:37:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-07-13 20:37:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:05,373 INFO L225 Difference]: With dead ends: 6089 [2021-07-13 20:37:05,374 INFO L226 Difference]: Without dead ends: 6089 [2021-07-13 20:37:05,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 711.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:37:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2021-07-13 20:37:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 2256. [2021-07-13 20:37:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.4350332594235033) internal successors, (7746), 2255 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7746 transitions. [2021-07-13 20:37:05,440 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7746 transitions. Word has length 28 [2021-07-13 20:37:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:05,440 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 7746 transitions. [2021-07-13 20:37:05,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:05,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7746 transitions. [2021-07-13 20:37:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:05,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:05,443 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:05,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3963 [2021-07-13 20:37:05,657 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-07-13 20:37:05,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:05,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52644734] [2021-07-13 20:37:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:05,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:05,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52644734] [2021-07-13 20:37:05,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52644734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:05,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859521393] [2021-07-13 20:37:05,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:05,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:05,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:05,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:05,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:05,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859521393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:05,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:05,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:37:05,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959028599] [2021-07-13 20:37:05,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:37:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:37:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:05,825 INFO L87 Difference]: Start difference. First operand 2256 states and 7746 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-13 20:37:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:06,857 INFO L93 Difference]: Finished difference Result 5162 states and 15913 transitions. [2021-07-13 20:37:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:37:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-07-13 20:37:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:06,867 INFO L225 Difference]: With dead ends: 5162 [2021-07-13 20:37:06,867 INFO L226 Difference]: Without dead ends: 5162 [2021-07-13 20:37:06,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:37:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-07-13 20:37:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 2269. [2021-07-13 20:37:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 3.432980599647266) internal successors, (7786), 2268 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 7786 transitions. [2021-07-13 20:37:06,920 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 7786 transitions. Word has length 28 [2021-07-13 20:37:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:06,921 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 7786 transitions. [2021-07-13 20:37:06,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-13 20:37:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 7786 transitions. [2021-07-13 20:37:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:06,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:06,924 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:07,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3964,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:07,141 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 65 times [2021-07-13 20:37:07,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:07,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863895463] [2021-07-13 20:37:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:07,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:07,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863895463] [2021-07-13 20:37:07,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863895463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:07,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882678506] [2021-07-13 20:37:07,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:07,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:37:07,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:07,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882678506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:07,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:07,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:37:07,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616809390] [2021-07-13 20:37:07,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:37:07,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:07,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:37:07,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:37:07,277 INFO L87 Difference]: Start difference. First operand 2269 states and 7786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:07,821 INFO L93 Difference]: Finished difference Result 4589 states and 14330 transitions. [2021-07-13 20:37:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:37:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:07,829 INFO L225 Difference]: With dead ends: 4589 [2021-07-13 20:37:07,830 INFO L226 Difference]: Without dead ends: 4589 [2021-07-13 20:37:07,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:37:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-07-13 20:37:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 2339. [2021-07-13 20:37:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.417023096663815) internal successors, (7989), 2338 states have internal predecessors, (7989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7989 transitions. [2021-07-13 20:37:07,873 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7989 transitions. Word has length 28 [2021-07-13 20:37:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:07,873 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 7989 transitions. [2021-07-13 20:37:07,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7989 transitions. [2021-07-13 20:37:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:07,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:07,876 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:08,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3965 [2021-07-13 20:37:08,092 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-07-13 20:37:08,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:08,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109582343] [2021-07-13 20:37:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:08,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:08,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109582343] [2021-07-13 20:37:08,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109582343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:08,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722693996] [2021-07-13 20:37:08,122 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:08,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:08,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:08,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:08,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:08,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722693996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:08,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:08,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:08,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514756163] [2021-07-13 20:37:08,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:37:08,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:08,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:37:08,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:37:08,241 INFO L87 Difference]: Start difference. First operand 2339 states and 7989 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:37:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:08,409 INFO L93 Difference]: Finished difference Result 3853 states and 12551 transitions. [2021-07-13 20:37:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:37:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 28 [2021-07-13 20:37:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:08,415 INFO L225 Difference]: With dead ends: 3853 [2021-07-13 20:37:08,415 INFO L226 Difference]: Without dead ends: 3829 [2021-07-13 20:37:08,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-07-13 20:37:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 2701. [2021-07-13 20:37:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 3.4851851851851854) internal successors, (9410), 2700 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 9410 transitions. [2021-07-13 20:37:08,455 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 9410 transitions. Word has length 28 [2021-07-13 20:37:08,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:08,455 INFO L482 AbstractCegarLoop]: Abstraction has 2701 states and 9410 transitions. [2021-07-13 20:37:08,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:37:08,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 9410 transitions. [2021-07-13 20:37:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:08,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:08,459 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:08,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3966 [2021-07-13 20:37:08,675 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-07-13 20:37:08,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:08,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661664519] [2021-07-13 20:37:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:08,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:08,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661664519] [2021-07-13 20:37:08,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661664519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:08,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121678652] [2021-07-13 20:37:08,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:08,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:08,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:08,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121678652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:08,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:08,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:37:08,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087357652] [2021-07-13 20:37:08,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:08,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:08,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:08,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:08,814 INFO L87 Difference]: Start difference. First operand 2701 states and 9410 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:09,381 INFO L93 Difference]: Finished difference Result 4524 states and 14456 transitions. [2021-07-13 20:37:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:37:09,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:37:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:09,389 INFO L225 Difference]: With dead ends: 4524 [2021-07-13 20:37:09,389 INFO L226 Difference]: Without dead ends: 4477 [2021-07-13 20:37:09,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:37:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2021-07-13 20:37:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2866. [2021-07-13 20:37:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 3.505759162303665) internal successors, (10044), 2865 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 10044 transitions. [2021-07-13 20:37:09,437 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 10044 transitions. Word has length 28 [2021-07-13 20:37:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:09,437 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 10044 transitions. [2021-07-13 20:37:09,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 10044 transitions. [2021-07-13 20:37:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:09,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:09,441 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:09,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3967 [2021-07-13 20:37:09,657 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-07-13 20:37:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:09,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433233083] [2021-07-13 20:37:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:09,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:09,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433233083] [2021-07-13 20:37:09,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433233083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:09,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033833688] [2021-07-13 20:37:09,689 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:09,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:37:09,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:09,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:09,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:09,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033833688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:09,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:09,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:37:09,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300063967] [2021-07-13 20:37:09,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:37:09,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:37:09,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:37:09,804 INFO L87 Difference]: Start difference. First operand 2866 states and 10044 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:10,471 INFO L93 Difference]: Finished difference Result 4809 states and 15088 transitions. [2021-07-13 20:37:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:37:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:10,479 INFO L225 Difference]: With dead ends: 4809 [2021-07-13 20:37:10,479 INFO L226 Difference]: Without dead ends: 4783 [2021-07-13 20:37:10,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:37:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-07-13 20:37:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 2887. [2021-07-13 20:37:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.512127512127512) internal successors, (10136), 2886 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10136 transitions. [2021-07-13 20:37:10,529 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10136 transitions. Word has length 28 [2021-07-13 20:37:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:10,530 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10136 transitions. [2021-07-13 20:37:10,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10136 transitions. [2021-07-13 20:37:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:10,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:10,534 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:10,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3968,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:10,750 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-07-13 20:37:10,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:10,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6228374] [2021-07-13 20:37:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:10,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:10,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6228374] [2021-07-13 20:37:10,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6228374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:10,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777171646] [2021-07-13 20:37:10,781 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:10,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:37:10,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:10,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777171646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:10,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:10,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:37:10,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638665934] [2021-07-13 20:37:10,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:37:10,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:37:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:37:10,903 INFO L87 Difference]: Start difference. First operand 2887 states and 10136 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:11,569 INFO L93 Difference]: Finished difference Result 4801 states and 15088 transitions. [2021-07-13 20:37:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:37:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:11,578 INFO L225 Difference]: With dead ends: 4801 [2021-07-13 20:37:11,578 INFO L226 Difference]: Without dead ends: 4786 [2021-07-13 20:37:11,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:37:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-07-13 20:37:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2887. [2021-07-13 20:37:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.5076230076230077) internal successors, (10123), 2886 states have internal predecessors, (10123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10123 transitions. [2021-07-13 20:37:11,632 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10123 transitions. Word has length 28 [2021-07-13 20:37:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:11,632 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10123 transitions. [2021-07-13 20:37:11,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10123 transitions. [2021-07-13 20:37:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:11,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:11,636 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:11,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-07-13 20:37:11,852 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:11,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-07-13 20:37:11,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:11,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129365242] [2021-07-13 20:37:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:11,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:11,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129365242] [2021-07-13 20:37:11,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129365242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:11,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839000698] [2021-07-13 20:37:11,877 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:11,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:11,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839000698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:11,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:11,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:37:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063568866] [2021-07-13 20:37:11,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:11,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:11,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:11,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:11,948 INFO L87 Difference]: Start difference. First operand 2887 states and 10123 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:37:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:12,321 INFO L93 Difference]: Finished difference Result 5555 states and 17807 transitions. [2021-07-13 20:37:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:37:12,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:37:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:12,373 INFO L225 Difference]: With dead ends: 5555 [2021-07-13 20:37:12,373 INFO L226 Difference]: Without dead ends: 5508 [2021-07-13 20:37:12,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:37:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-07-13 20:37:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3028. [2021-07-13 20:37:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 3.5500495540138752) internal successors, (10746), 3027 states have internal predecessors, (10746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 10746 transitions. [2021-07-13 20:37:12,432 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 10746 transitions. Word has length 28 [2021-07-13 20:37:12,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:12,432 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 10746 transitions. [2021-07-13 20:37:12,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:37:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 10746 transitions. [2021-07-13 20:37:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:12,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:12,436 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:12,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:12,652 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:12,653 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-07-13 20:37:12,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:12,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210592819] [2021-07-13 20:37:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:12,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210592819] [2021-07-13 20:37:12,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210592819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295312590] [2021-07-13 20:37:12,680 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:12,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:12,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:12,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:12,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:12,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295312590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:12,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:12,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:37:12,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589726669] [2021-07-13 20:37:12,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:37:12,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:12,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:37:12,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:37:12,739 INFO L87 Difference]: Start difference. First operand 3028 states and 10746 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:12,846 INFO L93 Difference]: Finished difference Result 4339 states and 14289 transitions. [2021-07-13 20:37:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:37:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-07-13 20:37:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:12,853 INFO L225 Difference]: With dead ends: 4339 [2021-07-13 20:37:12,853 INFO L226 Difference]: Without dead ends: 4339 [2021-07-13 20:37:12,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-07-13 20:37:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 2863. [2021-07-13 20:37:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 3.5195667365478687) internal successors, (10073), 2862 states have internal predecessors, (10073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 10073 transitions. [2021-07-13 20:37:12,898 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 10073 transitions. Word has length 28 [2021-07-13 20:37:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:12,899 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 10073 transitions. [2021-07-13 20:37:12,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 10073 transitions. [2021-07-13 20:37:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:12,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:12,902 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:13,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:13,119 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-07-13 20:37:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:13,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354494142] [2021-07-13 20:37:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:13,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:13,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354494142] [2021-07-13 20:37:13,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354494142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:13,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197565609] [2021-07-13 20:37:13,150 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:13,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:37:13,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:13,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:13,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:13,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197565609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:13,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:13,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:37:13,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270270215] [2021-07-13 20:37:13,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:13,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:13,244 INFO L87 Difference]: Start difference. First operand 2863 states and 10073 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:13,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:13,872 INFO L93 Difference]: Finished difference Result 6209 states and 19661 transitions. [2021-07-13 20:37:13,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:37:13,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:37:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:13,883 INFO L225 Difference]: With dead ends: 6209 [2021-07-13 20:37:13,883 INFO L226 Difference]: Without dead ends: 6209 [2021-07-13 20:37:13,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:37:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2021-07-13 20:37:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 2881. [2021-07-13 20:37:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.5194444444444444) internal successors, (10136), 2880 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10136 transitions. [2021-07-13 20:37:13,951 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10136 transitions. Word has length 28 [2021-07-13 20:37:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:13,951 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10136 transitions. [2021-07-13 20:37:13,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10136 transitions. [2021-07-13 20:37:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:13,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:13,955 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:14,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:14,171 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:14,172 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-07-13 20:37:14,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:14,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330253371] [2021-07-13 20:37:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:14,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:14,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330253371] [2021-07-13 20:37:14,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330253371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:14,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694070093] [2021-07-13 20:37:14,203 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:14,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:14,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:14,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:14,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:14,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694070093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:14,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:14,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:37:14,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612929090] [2021-07-13 20:37:14,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:14,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:14,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:14,304 INFO L87 Difference]: Start difference. First operand 2881 states and 10136 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:15,078 INFO L93 Difference]: Finished difference Result 6471 states and 20458 transitions. [2021-07-13 20:37:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:37:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:37:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:15,091 INFO L225 Difference]: With dead ends: 6471 [2021-07-13 20:37:15,091 INFO L226 Difference]: Without dead ends: 6471 [2021-07-13 20:37:15,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:37:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-07-13 20:37:15,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 2975. [2021-07-13 20:37:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.511432414256893) internal successors, (10443), 2974 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10443 transitions. [2021-07-13 20:37:15,170 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10443 transitions. Word has length 28 [2021-07-13 20:37:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:15,170 INFO L482 AbstractCegarLoop]: Abstraction has 2975 states and 10443 transitions. [2021-07-13 20:37:15,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10443 transitions. [2021-07-13 20:37:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:15,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:15,174 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:15,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:15,390 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:15,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-07-13 20:37:15,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:15,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329256693] [2021-07-13 20:37:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:15,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:15,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329256693] [2021-07-13 20:37:15,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329256693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:15,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040086846] [2021-07-13 20:37:15,414 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:15,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:15,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:15,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:15,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:15,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040086846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:15,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:15,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:37:15,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656812328] [2021-07-13 20:37:15,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:15,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:15,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:15,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:15,504 INFO L87 Difference]: Start difference. First operand 2975 states and 10443 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:37:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:15,977 INFO L93 Difference]: Finished difference Result 6662 states and 21078 transitions. [2021-07-13 20:37:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:37:15,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:37:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:15,990 INFO L225 Difference]: With dead ends: 6662 [2021-07-13 20:37:15,991 INFO L226 Difference]: Without dead ends: 6626 [2021-07-13 20:37:15,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:37:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-07-13 20:37:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 3377. [2021-07-13 20:37:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.5390995260663507) internal successors, (11948), 3376 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 11948 transitions. [2021-07-13 20:37:16,076 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 11948 transitions. Word has length 28 [2021-07-13 20:37:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:16,076 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 11948 transitions. [2021-07-13 20:37:16,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:37:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 11948 transitions. [2021-07-13 20:37:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:16,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:16,082 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:16,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:16,298 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:16,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:16,298 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-07-13 20:37:16,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:16,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914507887] [2021-07-13 20:37:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:16,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:16,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914507887] [2021-07-13 20:37:16,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914507887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:16,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366915091] [2021-07-13 20:37:16,330 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:16,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:16,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:16,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366915091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:16,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:16,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:37:16,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336488155] [2021-07-13 20:37:16,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:16,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:16,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:16,447 INFO L87 Difference]: Start difference. First operand 3377 states and 11948 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:37:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:16,999 INFO L93 Difference]: Finished difference Result 6820 states and 21509 transitions. [2021-07-13 20:37:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:37:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:37:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:17,010 INFO L225 Difference]: With dead ends: 6820 [2021-07-13 20:37:17,010 INFO L226 Difference]: Without dead ends: 6820 [2021-07-13 20:37:17,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:37:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6820 states. [2021-07-13 20:37:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6820 to 3088. [2021-07-13 20:37:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 3.498542274052478) internal successors, (10800), 3087 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 10800 transitions. [2021-07-13 20:37:17,083 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 10800 transitions. Word has length 28 [2021-07-13 20:37:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:17,083 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 10800 transitions. [2021-07-13 20:37:17,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:37:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 10800 transitions. [2021-07-13 20:37:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:17,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:17,087 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:17,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3975 [2021-07-13 20:37:17,303 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:17,303 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-07-13 20:37:17,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:17,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887111466] [2021-07-13 20:37:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:17,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:17,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887111466] [2021-07-13 20:37:17,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887111466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:17,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724876504] [2021-07-13 20:37:17,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:17,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724876504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:17,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:17,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:37:17,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20963518] [2021-07-13 20:37:17,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:17,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:17,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:17,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:17,438 INFO L87 Difference]: Start difference. First operand 3088 states and 10800 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:18,124 INFO L93 Difference]: Finished difference Result 5973 states and 19224 transitions. [2021-07-13 20:37:18,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:37:18,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:37:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:18,136 INFO L225 Difference]: With dead ends: 5973 [2021-07-13 20:37:18,136 INFO L226 Difference]: Without dead ends: 5969 [2021-07-13 20:37:18,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:37:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-07-13 20:37:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 2848. [2021-07-13 20:37:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 3.523709167544784) internal successors, (10032), 2847 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 10032 transitions. [2021-07-13 20:37:18,199 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 10032 transitions. Word has length 28 [2021-07-13 20:37:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:18,199 INFO L482 AbstractCegarLoop]: Abstraction has 2848 states and 10032 transitions. [2021-07-13 20:37:18,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 10032 transitions. [2021-07-13 20:37:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:18,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:18,203 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:18,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:18,419 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:18,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:18,419 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-07-13 20:37:18,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:18,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910065651] [2021-07-13 20:37:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:18,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910065651] [2021-07-13 20:37:18,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910065651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479165977] [2021-07-13 20:37:18,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:18,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:18,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:18,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:18,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479165977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:18,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:18,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:37:18,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497620697] [2021-07-13 20:37:18,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:37:18,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:37:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:37:18,615 INFO L87 Difference]: Start difference. First operand 2848 states and 10032 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:19,626 INFO L93 Difference]: Finished difference Result 9218 states and 30019 transitions. [2021-07-13 20:37:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:37:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-07-13 20:37:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:19,644 INFO L225 Difference]: With dead ends: 9218 [2021-07-13 20:37:19,645 INFO L226 Difference]: Without dead ends: 9218 [2021-07-13 20:37:19,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 590.4ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:37:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-07-13 20:37:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 3024. [2021-07-13 20:37:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3023 states have (on average 3.595765795567317) internal successors, (10870), 3023 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 10870 transitions. [2021-07-13 20:37:19,742 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 10870 transitions. Word has length 28 [2021-07-13 20:37:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:19,742 INFO L482 AbstractCegarLoop]: Abstraction has 3024 states and 10870 transitions. [2021-07-13 20:37:19,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 10870 transitions. [2021-07-13 20:37:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:19,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:19,746 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:19,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3977 [2021-07-13 20:37:19,962 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:19,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-07-13 20:37:19,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:19,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853704029] [2021-07-13 20:37:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:19,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:19,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853704029] [2021-07-13 20:37:19,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853704029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:19,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750817181] [2021-07-13 20:37:19,993 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 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 [2021-07-13 20:37:20,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:37:20,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:20,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:20,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:20,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750817181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:20,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:20,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:37:20,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807214427] [2021-07-13 20:37:20,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:37:20,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:20,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:37:20,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:37:20,108 INFO L87 Difference]: Start difference. First operand 3024 states and 10870 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:21,165 INFO L93 Difference]: Finished difference Result 9047 states and 29554 transitions. [2021-07-13 20:37:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:37:21,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-07-13 20:37:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:21,183 INFO L225 Difference]: With dead ends: 9047 [2021-07-13 20:37:21,183 INFO L226 Difference]: Without dead ends: 9047 [2021-07-13 20:37:21,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 585.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:37:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-07-13 20:37:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 2996. [2021-07-13 20:37:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2995 states have (on average 3.579632721202003) internal successors, (10721), 2995 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 10721 transitions. [2021-07-13 20:37:21,277 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 10721 transitions. Word has length 28 [2021-07-13 20:37:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:21,278 INFO L482 AbstractCegarLoop]: Abstraction has 2996 states and 10721 transitions. [2021-07-13 20:37:21,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 10721 transitions. [2021-07-13 20:37:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:21,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:21,282 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:21,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3978,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:21,502 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:21,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-07-13 20:37:21,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:21,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685223113] [2021-07-13 20:37:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:21,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:21,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685223113] [2021-07-13 20:37:21,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685223113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:21,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5441509] [2021-07-13 20:37:21,561 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 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 [2021-07-13 20:37:21,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:21,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:21,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5441509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:21,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:21,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:37:21,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764037183] [2021-07-13 20:37:21,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:21,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:21,701 INFO L87 Difference]: Start difference. First operand 2996 states and 10721 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:22,651 INFO L93 Difference]: Finished difference Result 8494 states and 26829 transitions. [2021-07-13 20:37:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:37:22,652 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:22,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:22,680 INFO L225 Difference]: With dead ends: 8494 [2021-07-13 20:37:22,681 INFO L226 Difference]: Without dead ends: 8494 [2021-07-13 20:37:22,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 511.4ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:37:22,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2021-07-13 20:37:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 3016. [2021-07-13 20:37:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 3.5830845771144277) internal successors, (10803), 3015 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 10803 transitions. [2021-07-13 20:37:22,810 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 10803 transitions. Word has length 28 [2021-07-13 20:37:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:22,811 INFO L482 AbstractCegarLoop]: Abstraction has 3016 states and 10803 transitions. [2021-07-13 20:37:22,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 10803 transitions. [2021-07-13 20:37:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:22,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:22,816 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:23,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3979 [2021-07-13 20:37:23,033 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:23,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-07-13 20:37:23,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:23,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659895725] [2021-07-13 20:37:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:23,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:23,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659895725] [2021-07-13 20:37:23,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659895725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:23,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232563472] [2021-07-13 20:37:23,069 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 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 [2021-07-13 20:37:23,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:37:23,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:23,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:23,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:23,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232563472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:23,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:23,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:37:23,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446227337] [2021-07-13 20:37:23,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:23,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:23,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:23,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:23,167 INFO L87 Difference]: Start difference. First operand 3016 states and 10803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:24,034 INFO L93 Difference]: Finished difference Result 8003 states and 25641 transitions. [2021-07-13 20:37:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:37:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:24,054 INFO L225 Difference]: With dead ends: 8003 [2021-07-13 20:37:24,054 INFO L226 Difference]: Without dead ends: 7995 [2021-07-13 20:37:24,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:37:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-07-13 20:37:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 2998. [2021-07-13 20:37:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.578912245578912) internal successors, (10726), 2997 states have internal predecessors, (10726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 10726 transitions. [2021-07-13 20:37:24,152 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 10726 transitions. Word has length 28 [2021-07-13 20:37:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:24,152 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 10726 transitions. [2021-07-13 20:37:24,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 10726 transitions. [2021-07-13 20:37:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:24,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:24,156 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:24,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-07-13 20:37:24,372 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-07-13 20:37:24,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:24,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968794765] [2021-07-13 20:37:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:24,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968794765] [2021-07-13 20:37:24,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968794765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667794526] [2021-07-13 20:37:24,402 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 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 [2021-07-13 20:37:24,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:37:24,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:24,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667794526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:24,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:24,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:37:24,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578255460] [2021-07-13 20:37:24,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:37:24,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:24,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:37:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:37:24,500 INFO L87 Difference]: Start difference. First operand 2998 states and 10726 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:25,391 INFO L93 Difference]: Finished difference Result 7921 states and 25395 transitions. [2021-07-13 20:37:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:37:25,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:25,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:25,428 INFO L225 Difference]: With dead ends: 7921 [2021-07-13 20:37:25,428 INFO L226 Difference]: Without dead ends: 7921 [2021-07-13 20:37:25,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:37:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-07-13 20:37:25,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 3014. [2021-07-13 20:37:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5811483571191505) internal successors, (10790), 3013 states have internal predecessors, (10790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10790 transitions. [2021-07-13 20:37:25,593 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10790 transitions. Word has length 28 [2021-07-13 20:37:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:25,593 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10790 transitions. [2021-07-13 20:37:25,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10790 transitions. [2021-07-13 20:37:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:25,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:25,614 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:25,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:25,815 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:25,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-07-13 20:37:25,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:25,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52997479] [2021-07-13 20:37:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:25,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:25,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52997479] [2021-07-13 20:37:25,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52997479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:25,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412321641] [2021-07-13 20:37:25,845 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 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 [2021-07-13 20:37:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:25,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:25,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:25,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412321641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:25,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:25,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:37:25,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762696460] [2021-07-13 20:37:25,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:37:25,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:25,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:37:25,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:37:25,959 INFO L87 Difference]: Start difference. First operand 3014 states and 10790 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:26,909 INFO L93 Difference]: Finished difference Result 7589 states and 24611 transitions. [2021-07-13 20:37:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:37:26,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:26,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:26,924 INFO L225 Difference]: With dead ends: 7589 [2021-07-13 20:37:26,924 INFO L226 Difference]: Without dead ends: 7581 [2021-07-13 20:37:26,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 501.3ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:37:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2021-07-13 20:37:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 2771. [2021-07-13 20:37:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 3.4974729241877256) internal successors, (9688), 2770 states have internal predecessors, (9688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 9688 transitions. [2021-07-13 20:37:27,043 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 9688 transitions. Word has length 28 [2021-07-13 20:37:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:27,043 INFO L482 AbstractCegarLoop]: Abstraction has 2771 states and 9688 transitions. [2021-07-13 20:37:27,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 9688 transitions. [2021-07-13 20:37:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:27,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:27,047 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:27,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3982 [2021-07-13 20:37:27,263 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:27,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-07-13 20:37:27,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:27,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959429126] [2021-07-13 20:37:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:27,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:27,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959429126] [2021-07-13 20:37:27,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959429126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:27,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668178723] [2021-07-13 20:37:27,296 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 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 [2021-07-13 20:37:27,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:27,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:27,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:27,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:27,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668178723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:27,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:27,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:37:27,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142428060] [2021-07-13 20:37:27,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:37:27,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:27,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:37:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:37:27,423 INFO L87 Difference]: Start difference. First operand 2771 states and 9688 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:28,271 INFO L93 Difference]: Finished difference Result 5790 states and 18502 transitions. [2021-07-13 20:37:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:37:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:28,282 INFO L225 Difference]: With dead ends: 5790 [2021-07-13 20:37:28,282 INFO L226 Difference]: Without dead ends: 5790 [2021-07-13 20:37:28,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:37:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2021-07-13 20:37:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 2783. [2021-07-13 20:37:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.4960460100647017) internal successors, (9726), 2782 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 9726 transitions. [2021-07-13 20:37:28,344 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 9726 transitions. Word has length 28 [2021-07-13 20:37:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:28,344 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 9726 transitions. [2021-07-13 20:37:28,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 9726 transitions. [2021-07-13 20:37:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:28,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:28,349 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:28,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:28,564 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:28,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-07-13 20:37:28,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:28,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333528229] [2021-07-13 20:37:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:28,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:28,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333528229] [2021-07-13 20:37:28,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333528229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:28,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680120885] [2021-07-13 20:37:28,603 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 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 [2021-07-13 20:37:28,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:37:28,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:28,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:28,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:28,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680120885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:28,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:28,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:37:28,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553473280] [2021-07-13 20:37:28,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:37:28,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:28,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:37:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:28,740 INFO L87 Difference]: Start difference. First operand 2783 states and 9726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:29,799 INFO L93 Difference]: Finished difference Result 6569 states and 20497 transitions. [2021-07-13 20:37:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:37:29,800 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:29,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:29,811 INFO L225 Difference]: With dead ends: 6569 [2021-07-13 20:37:29,812 INFO L226 Difference]: Without dead ends: 6569 [2021-07-13 20:37:29,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:37:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2021-07-13 20:37:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 2849. [2021-07-13 20:37:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.4912219101123596) internal successors, (9943), 2848 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9943 transitions. [2021-07-13 20:37:29,882 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9943 transitions. Word has length 28 [2021-07-13 20:37:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:29,882 INFO L482 AbstractCegarLoop]: Abstraction has 2849 states and 9943 transitions. [2021-07-13 20:37:29,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9943 transitions. [2021-07-13 20:37:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:29,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:29,886 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:30,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:30,086 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:30,087 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-07-13 20:37:30,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:30,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506968191] [2021-07-13 20:37:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:30,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:30,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506968191] [2021-07-13 20:37:30,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506968191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:30,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7699641] [2021-07-13 20:37:30,120 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 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 [2021-07-13 20:37:30,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:30,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:30,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7699641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:30,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:30,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:37:30,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904576558] [2021-07-13 20:37:30,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:37:30,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:30,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:37:30,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:30,244 INFO L87 Difference]: Start difference. First operand 2849 states and 9943 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:31,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:31,155 INFO L93 Difference]: Finished difference Result 6132 states and 19351 transitions. [2021-07-13 20:37:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:37:31,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:31,166 INFO L225 Difference]: With dead ends: 6132 [2021-07-13 20:37:31,166 INFO L226 Difference]: Without dead ends: 6128 [2021-07-13 20:37:31,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 557.2ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:37:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-07-13 20:37:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 2775. [2021-07-13 20:37:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4870223503965394) internal successors, (9673), 2774 states have internal predecessors, (9673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9673 transitions. [2021-07-13 20:37:31,258 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9673 transitions. Word has length 28 [2021-07-13 20:37:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:31,258 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9673 transitions. [2021-07-13 20:37:31,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9673 transitions. [2021-07-13 20:37:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:31,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:31,261 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:31,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:31,477 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 66 times [2021-07-13 20:37:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:31,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214940297] [2021-07-13 20:37:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:31,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:31,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214940297] [2021-07-13 20:37:31,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214940297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:31,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14944664] [2021-07-13 20:37:31,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:31,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:37:31,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:31,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:31,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14944664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:31,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:31,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:37:31,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296572159] [2021-07-13 20:37:31,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:31,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:31,614 INFO L87 Difference]: Start difference. First operand 2775 states and 9673 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:37:32,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:32,157 INFO L93 Difference]: Finished difference Result 5268 states and 16907 transitions. [2021-07-13 20:37:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:37:32,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-07-13 20:37:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:32,167 INFO L225 Difference]: With dead ends: 5268 [2021-07-13 20:37:32,167 INFO L226 Difference]: Without dead ends: 5268 [2021-07-13 20:37:32,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:37:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-07-13 20:37:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 2775. [2021-07-13 20:37:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4891852919971162) internal successors, (9679), 2774 states have internal predecessors, (9679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9679 transitions. [2021-07-13 20:37:32,219 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9679 transitions. Word has length 28 [2021-07-13 20:37:32,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:32,219 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9679 transitions. [2021-07-13 20:37:32,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:37:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9679 transitions. [2021-07-13 20:37:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:32,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:32,223 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:32,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:32,431 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:32,431 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 67 times [2021-07-13 20:37:32,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:32,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696103811] [2021-07-13 20:37:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:32,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:32,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696103811] [2021-07-13 20:37:32,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696103811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:32,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326030699] [2021-07-13 20:37:32,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:32,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:32,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:32,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326030699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:32,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:32,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:37:32,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661144756] [2021-07-13 20:37:32,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:32,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:32,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:32,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:32,574 INFO L87 Difference]: Start difference. First operand 2775 states and 9679 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:37:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:33,313 INFO L93 Difference]: Finished difference Result 5584 states and 17812 transitions. [2021-07-13 20:37:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:37:33,314 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-07-13 20:37:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:33,323 INFO L225 Difference]: With dead ends: 5584 [2021-07-13 20:37:33,323 INFO L226 Difference]: Without dead ends: 5584 [2021-07-13 20:37:33,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:37:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2021-07-13 20:37:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 2766. [2021-07-13 20:37:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 3.489330922242315) internal successors, (9648), 2765 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 9648 transitions. [2021-07-13 20:37:33,421 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 9648 transitions. Word has length 28 [2021-07-13 20:37:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:33,421 INFO L482 AbstractCegarLoop]: Abstraction has 2766 states and 9648 transitions. [2021-07-13 20:37:33,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:37:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 9648 transitions. [2021-07-13 20:37:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:33,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:33,425 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:33,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3987 [2021-07-13 20:37:33,641 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:33,641 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 68 times [2021-07-13 20:37:33,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:33,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844219406] [2021-07-13 20:37:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:33,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:33,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844219406] [2021-07-13 20:37:33,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844219406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:33,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868117375] [2021-07-13 20:37:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:33,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:33,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:33,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:33,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868117375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:33,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:33,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:37:33,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27036489] [2021-07-13 20:37:33,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:33,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:33,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:33,778 INFO L87 Difference]: Start difference. First operand 2766 states and 9648 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:37:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:34,616 INFO L93 Difference]: Finished difference Result 6079 states and 19142 transitions. [2021-07-13 20:37:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:37:34,616 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-07-13 20:37:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:34,627 INFO L225 Difference]: With dead ends: 6079 [2021-07-13 20:37:34,627 INFO L226 Difference]: Without dead ends: 6079 [2021-07-13 20:37:34,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:37:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6079 states. [2021-07-13 20:37:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6079 to 2826. [2021-07-13 20:37:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2825 states have (on average 3.485309734513274) internal successors, (9846), 2825 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 9846 transitions. [2021-07-13 20:37:34,690 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 9846 transitions. Word has length 28 [2021-07-13 20:37:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:34,690 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 9846 transitions. [2021-07-13 20:37:34,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:37:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 9846 transitions. [2021-07-13 20:37:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:34,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:34,694 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:34,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:34,894 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 69 times [2021-07-13 20:37:34,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:34,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446073611] [2021-07-13 20:37:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:34,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:34,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446073611] [2021-07-13 20:37:34,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446073611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:34,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738235968] [2021-07-13 20:37:34,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:34,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:37:34,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:34,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:34,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:35,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738235968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:35,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:35,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:37:35,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900019924] [2021-07-13 20:37:35,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:37:35,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:35,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:37:35,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:35,053 INFO L87 Difference]: Start difference. First operand 2826 states and 9846 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:35,591 INFO L93 Difference]: Finished difference Result 6807 states and 22904 transitions. [2021-07-13 20:37:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:37:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 28 [2021-07-13 20:37:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:35,605 INFO L225 Difference]: With dead ends: 6807 [2021-07-13 20:37:35,605 INFO L226 Difference]: Without dead ends: 6807 [2021-07-13 20:37:35,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:37:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2021-07-13 20:37:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 4024. [2021-07-13 20:37:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 3.6109868257519264) internal successors, (14527), 4023 states have internal predecessors, (14527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 14527 transitions. [2021-07-13 20:37:35,752 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 14527 transitions. Word has length 28 [2021-07-13 20:37:35,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:35,752 INFO L482 AbstractCegarLoop]: Abstraction has 4024 states and 14527 transitions. [2021-07-13 20:37:35,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 14527 transitions. [2021-07-13 20:37:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:35,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:35,758 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:35,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-07-13 20:37:35,974 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 70 times [2021-07-13 20:37:35,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:35,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098306345] [2021-07-13 20:37:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:36,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:36,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098306345] [2021-07-13 20:37:36,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098306345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:36,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807601329] [2021-07-13 20:37:36,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:36,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:36,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:36,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:36,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807601329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:36,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:36,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:37:36,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444849047] [2021-07-13 20:37:36,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:36,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:36,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:36,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:36,120 INFO L87 Difference]: Start difference. First operand 4024 states and 14527 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:37:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:36,889 INFO L93 Difference]: Finished difference Result 7353 states and 24861 transitions. [2021-07-13 20:37:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:37:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-07-13 20:37:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:36,906 INFO L225 Difference]: With dead ends: 7353 [2021-07-13 20:37:36,907 INFO L226 Difference]: Without dead ends: 7349 [2021-07-13 20:37:36,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:37:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-07-13 20:37:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 3916. [2021-07-13 20:37:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 3.6206896551724137) internal successors, (14175), 3915 states have internal predecessors, (14175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 14175 transitions. [2021-07-13 20:37:37,015 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 14175 transitions. Word has length 28 [2021-07-13 20:37:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:37,015 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 14175 transitions. [2021-07-13 20:37:37,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:37:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 14175 transitions. [2021-07-13 20:37:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:37,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:37,022 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:37,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-07-13 20:37:37,239 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-07-13 20:37:37,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:37,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990764302] [2021-07-13 20:37:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:37,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:37,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990764302] [2021-07-13 20:37:37,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990764302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:37,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278019340] [2021-07-13 20:37:37,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:37,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:37,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:37,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:37,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278019340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:37,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:37,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:37:37,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678885699] [2021-07-13 20:37:37,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:37,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:37,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:37,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:37,369 INFO L87 Difference]: Start difference. First operand 3916 states and 14175 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:38,325 INFO L93 Difference]: Finished difference Result 8141 states and 27286 transitions. [2021-07-13 20:37:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:37:38,326 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:37:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:38,340 INFO L225 Difference]: With dead ends: 8141 [2021-07-13 20:37:38,340 INFO L226 Difference]: Without dead ends: 8132 [2021-07-13 20:37:38,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:37:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-07-13 20:37:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 4360. [2021-07-13 20:37:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 3.7118605184675384) internal successors, (16180), 4359 states have internal predecessors, (16180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 16180 transitions. [2021-07-13 20:37:38,430 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 16180 transitions. Word has length 28 [2021-07-13 20:37:38,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:38,430 INFO L482 AbstractCegarLoop]: Abstraction has 4360 states and 16180 transitions. [2021-07-13 20:37:38,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 16180 transitions. [2021-07-13 20:37:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:38,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:38,436 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:38,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-07-13 20:37:38,652 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:38,652 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-07-13 20:37:38,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:38,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058720381] [2021-07-13 20:37:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:38,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:38,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058720381] [2021-07-13 20:37:38,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058720381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:38,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514943881] [2021-07-13 20:37:38,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:38,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:38,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:38,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:38,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514943881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:38,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:38,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:37:38,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350288362] [2021-07-13 20:37:38,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:38,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:38,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:38,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:38,771 INFO L87 Difference]: Start difference. First operand 4360 states and 16180 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:39,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:39,452 INFO L93 Difference]: Finished difference Result 8418 states and 28143 transitions. [2021-07-13 20:37:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:37:39,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:37:39,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:39,468 INFO L225 Difference]: With dead ends: 8418 [2021-07-13 20:37:39,469 INFO L226 Difference]: Without dead ends: 8418 [2021-07-13 20:37:39,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 405.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:37:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-07-13 20:37:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 4380. [2021-07-13 20:37:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.69901804064855) internal successors, (16198), 4379 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 16198 transitions. [2021-07-13 20:37:39,565 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 16198 transitions. Word has length 28 [2021-07-13 20:37:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:39,566 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 16198 transitions. [2021-07-13 20:37:39,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 16198 transitions. [2021-07-13 20:37:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:39,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:39,572 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:39,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:39,791 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:39,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-07-13 20:37:39,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:39,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147286684] [2021-07-13 20:37:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:39,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:39,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147286684] [2021-07-13 20:37:39,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147286684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:39,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553375924] [2021-07-13 20:37:39,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:39,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:39,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553375924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:39,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:39,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:37:39,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745159698] [2021-07-13 20:37:39,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:39,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:39,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:39,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:39,941 INFO L87 Difference]: Start difference. First operand 4380 states and 16198 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:40,370 INFO L93 Difference]: Finished difference Result 7845 states and 27662 transitions. [2021-07-13 20:37:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:37:40,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:37:40,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:40,386 INFO L225 Difference]: With dead ends: 7845 [2021-07-13 20:37:40,386 INFO L226 Difference]: Without dead ends: 7762 [2021-07-13 20:37:40,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:37:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-07-13 20:37:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 5838. [2021-07-13 20:37:40,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 3.7627205756381703) internal successors, (21963), 5837 states have internal predecessors, (21963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 21963 transitions. [2021-07-13 20:37:40,549 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 21963 transitions. Word has length 28 [2021-07-13 20:37:40,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:40,549 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 21963 transitions. [2021-07-13 20:37:40,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 21963 transitions. [2021-07-13 20:37:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:40,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:40,558 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:40,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:40,774 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:40,774 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-07-13 20:37:40,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:40,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898772497] [2021-07-13 20:37:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:40,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:40,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898772497] [2021-07-13 20:37:40,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898772497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:40,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111769801] [2021-07-13 20:37:40,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:40,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:40,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:37:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:40,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111769801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:40,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:40,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:37:40,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525951834] [2021-07-13 20:37:40,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:37:40,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:37:40,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:37:40,877 INFO L87 Difference]: Start difference. First operand 5838 states and 21963 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:41,056 INFO L93 Difference]: Finished difference Result 8103 states and 28515 transitions. [2021-07-13 20:37:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:37:41,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:41,073 INFO L225 Difference]: With dead ends: 8103 [2021-07-13 20:37:41,073 INFO L226 Difference]: Without dead ends: 8103 [2021-07-13 20:37:41,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2021-07-13 20:37:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5980. [2021-07-13 20:37:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.7395885599598597) internal successors, (22359), 5979 states have internal predecessors, (22359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 22359 transitions. [2021-07-13 20:37:41,187 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 22359 transitions. Word has length 28 [2021-07-13 20:37:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:41,187 INFO L482 AbstractCegarLoop]: Abstraction has 5980 states and 22359 transitions. [2021-07-13 20:37:41,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 22359 transitions. [2021-07-13 20:37:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:41,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:41,196 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:41,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:41,412 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:41,412 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-07-13 20:37:41,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:41,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623884334] [2021-07-13 20:37:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:41,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:41,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623884334] [2021-07-13 20:37:41,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623884334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:41,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411647947] [2021-07-13 20:37:41,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:41,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:37:41,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:41,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411647947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:41,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:41,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:37:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875981829] [2021-07-13 20:37:41,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:41,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:41,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:41,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:41,541 INFO L87 Difference]: Start difference. First operand 5980 states and 22359 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:42,236 INFO L93 Difference]: Finished difference Result 12480 states and 43435 transitions. [2021-07-13 20:37:42,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:37:42,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:42,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:42,267 INFO L225 Difference]: With dead ends: 12480 [2021-07-13 20:37:42,267 INFO L226 Difference]: Without dead ends: 12480 [2021-07-13 20:37:42,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:37:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12480 states. [2021-07-13 20:37:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12480 to 6653. [2021-07-13 20:37:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6653 states, 6652 states have (on average 3.753607937462417) internal successors, (24969), 6652 states have internal predecessors, (24969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6653 states to 6653 states and 24969 transitions. [2021-07-13 20:37:42,520 INFO L78 Accepts]: Start accepts. Automaton has 6653 states and 24969 transitions. Word has length 28 [2021-07-13 20:37:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:42,520 INFO L482 AbstractCegarLoop]: Abstraction has 6653 states and 24969 transitions. [2021-07-13 20:37:42,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6653 states and 24969 transitions. [2021-07-13 20:37:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:42,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:42,531 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:42,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:42,748 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:42,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-07-13 20:37:42,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:42,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935635965] [2021-07-13 20:37:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:42,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:42,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935635965] [2021-07-13 20:37:42,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935635965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:42,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489441712] [2021-07-13 20:37:42,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:42,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:42,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:42,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:42,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:42,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489441712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:42,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:42,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:37:42,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404129064] [2021-07-13 20:37:42,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:42,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:42,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:42,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:42,866 INFO L87 Difference]: Start difference. First operand 6653 states and 24969 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:43,580 INFO L93 Difference]: Finished difference Result 12633 states and 43998 transitions. [2021-07-13 20:37:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:37:43,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:43,607 INFO L225 Difference]: With dead ends: 12633 [2021-07-13 20:37:43,608 INFO L226 Difference]: Without dead ends: 12633 [2021-07-13 20:37:43,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:37:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12633 states. [2021-07-13 20:37:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12633 to 6881. [2021-07-13 20:37:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6881 states, 6880 states have (on average 3.734156976744186) internal successors, (25691), 6880 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 25691 transitions. [2021-07-13 20:37:43,776 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 25691 transitions. Word has length 28 [2021-07-13 20:37:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:43,776 INFO L482 AbstractCegarLoop]: Abstraction has 6881 states and 25691 transitions. [2021-07-13 20:37:43,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 25691 transitions. [2021-07-13 20:37:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:43,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:43,787 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:44,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-07-13 20:37:44,002 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:44,003 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-07-13 20:37:44,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:44,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624362830] [2021-07-13 20:37:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:44,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:44,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624362830] [2021-07-13 20:37:44,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624362830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:44,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126584308] [2021-07-13 20:37:44,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:44,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:37:44,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:44,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:44,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:44,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126584308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:44,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:44,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:44,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404745370] [2021-07-13 20:37:44,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:37:44,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:44,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:37:44,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:37:44,115 INFO L87 Difference]: Start difference. First operand 6881 states and 25691 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:44,451 INFO L93 Difference]: Finished difference Result 9357 states and 33618 transitions. [2021-07-13 20:37:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:37:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-13 20:37:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:44,470 INFO L225 Difference]: With dead ends: 9357 [2021-07-13 20:37:44,470 INFO L226 Difference]: Without dead ends: 9327 [2021-07-13 20:37:44,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:37:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-07-13 20:37:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 7728. [2021-07-13 20:37:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7728 states, 7727 states have (on average 3.760450368836547) internal successors, (29057), 7727 states have internal predecessors, (29057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7728 states to 7728 states and 29057 transitions. [2021-07-13 20:37:44,683 INFO L78 Accepts]: Start accepts. Automaton has 7728 states and 29057 transitions. Word has length 28 [2021-07-13 20:37:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:44,683 INFO L482 AbstractCegarLoop]: Abstraction has 7728 states and 29057 transitions. [2021-07-13 20:37:44,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 7728 states and 29057 transitions. [2021-07-13 20:37:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:44,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:44,695 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:44,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:44,912 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-07-13 20:37:44,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:44,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523868502] [2021-07-13 20:37:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:44,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523868502] [2021-07-13 20:37:44,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523868502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954927548] [2021-07-13 20:37:44,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:44,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:37:44,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:44,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:44,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:45,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954927548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:45,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:45,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:37:45,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586435043] [2021-07-13 20:37:45,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:37:45,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:45,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:37:45,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:37:45,048 INFO L87 Difference]: Start difference. First operand 7728 states and 29057 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:45,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:45,364 INFO L93 Difference]: Finished difference Result 9961 states and 35609 transitions. [2021-07-13 20:37:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:37:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-13 20:37:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:45,386 INFO L225 Difference]: With dead ends: 9961 [2021-07-13 20:37:45,387 INFO L226 Difference]: Without dead ends: 9961 [2021-07-13 20:37:45,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:37:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-07-13 20:37:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7768. [2021-07-13 20:37:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7768 states, 7767 states have (on average 3.756405304493369) internal successors, (29176), 7767 states have internal predecessors, (29176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7768 states to 7768 states and 29176 transitions. [2021-07-13 20:37:45,554 INFO L78 Accepts]: Start accepts. Automaton has 7768 states and 29176 transitions. Word has length 28 [2021-07-13 20:37:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:45,555 INFO L482 AbstractCegarLoop]: Abstraction has 7768 states and 29176 transitions. [2021-07-13 20:37:45,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 7768 states and 29176 transitions. [2021-07-13 20:37:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:45,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:45,568 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:45,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3998 [2021-07-13 20:37:45,784 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-07-13 20:37:45,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:45,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4804733] [2021-07-13 20:37:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:45,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:45,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4804733] [2021-07-13 20:37:45,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4804733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:45,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408085024] [2021-07-13 20:37:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:45,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:45,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:37:45,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408085024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:45,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:45,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:37:45,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774620230] [2021-07-13 20:37:45,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:45,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:45,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:45,880 INFO L87 Difference]: Start difference. First operand 7768 states and 29176 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:46,422 INFO L93 Difference]: Finished difference Result 13358 states and 47391 transitions. [2021-07-13 20:37:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:37:46,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:46,452 INFO L225 Difference]: With dead ends: 13358 [2021-07-13 20:37:46,452 INFO L226 Difference]: Without dead ends: 13354 [2021-07-13 20:37:46,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:37:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13354 states. [2021-07-13 20:37:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13354 to 7674. [2021-07-13 20:37:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.760328424345106) internal successors, (28853), 7673 states have internal predecessors, (28853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 28853 transitions. [2021-07-13 20:37:46,711 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 28853 transitions. Word has length 28 [2021-07-13 20:37:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:46,711 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 28853 transitions. [2021-07-13 20:37:46,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 28853 transitions. [2021-07-13 20:37:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:46,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:46,724 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:46,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3999,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:46,941 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:46,941 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-07-13 20:37:46,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:46,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991424290] [2021-07-13 20:37:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:46,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:46,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991424290] [2021-07-13 20:37:46,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991424290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:46,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891506141] [2021-07-13 20:37:46,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:46,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:46,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:46,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:37:46,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:47,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891506141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:47,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:47,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:37:47,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91426118] [2021-07-13 20:37:47,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:37:47,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:47,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:37:47,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:37:47,045 INFO L87 Difference]: Start difference. First operand 7674 states and 28853 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:47,422 INFO L93 Difference]: Finished difference Result 10180 states and 36418 transitions. [2021-07-13 20:37:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:37:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:37:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:47,445 INFO L225 Difference]: With dead ends: 10180 [2021-07-13 20:37:47,445 INFO L226 Difference]: Without dead ends: 10180 [2021-07-13 20:37:47,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:37:47,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10180 states. [2021-07-13 20:37:47,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10180 to 7620. [2021-07-13 20:37:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7531172069825436) internal successors, (28595), 7619 states have internal predecessors, (28595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28595 transitions. [2021-07-13 20:37:47,595 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28595 transitions. Word has length 28 [2021-07-13 20:37:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:47,595 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28595 transitions. [2021-07-13 20:37:47,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28595 transitions. [2021-07-13 20:37:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:47,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:47,607 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:47,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-07-13 20:37:47,821 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:47,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-07-13 20:37:47,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:47,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128211693] [2021-07-13 20:37:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:47,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:47,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128211693] [2021-07-13 20:37:47,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128211693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:47,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724243654] [2021-07-13 20:37:47,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:47,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:37:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:47,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:47,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724243654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:47,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:47,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:37:47,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245408152] [2021-07-13 20:37:47,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:37:47,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:47,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:37:47,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:37:47,939 INFO L87 Difference]: Start difference. First operand 7620 states and 28595 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:48,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:48,699 INFO L93 Difference]: Finished difference Result 13241 states and 46888 transitions. [2021-07-13 20:37:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:37:48,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:48,730 INFO L225 Difference]: With dead ends: 13241 [2021-07-13 20:37:48,731 INFO L226 Difference]: Without dead ends: 13229 [2021-07-13 20:37:48,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:37:48,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-07-13 20:37:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 7620. [2021-07-13 20:37:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7520672004200026) internal successors, (28587), 7619 states have internal predecessors, (28587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28587 transitions. [2021-07-13 20:37:48,949 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28587 transitions. Word has length 28 [2021-07-13 20:37:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:48,949 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28587 transitions. [2021-07-13 20:37:48,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28587 transitions. [2021-07-13 20:37:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:48,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:48,962 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:49,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-07-13 20:37:49,178 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:49,178 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-07-13 20:37:49,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:49,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898599560] [2021-07-13 20:37:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:49,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:49,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898599560] [2021-07-13 20:37:49,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898599560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:49,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905262596] [2021-07-13 20:37:49,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:49,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:49,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:49,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:49,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905262596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:49,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:49,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:37:49,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263589747] [2021-07-13 20:37:49,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:49,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:49,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:49,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:49,297 INFO L87 Difference]: Start difference. First operand 7620 states and 28587 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:50,330 INFO L93 Difference]: Finished difference Result 20083 states and 70057 transitions. [2021-07-13 20:37:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:37:50,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:37:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:50,380 INFO L225 Difference]: With dead ends: 20083 [2021-07-13 20:37:50,380 INFO L226 Difference]: Without dead ends: 20083 [2021-07-13 20:37:50,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 608.1ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:37:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20083 states. [2021-07-13 20:37:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20083 to 10419. [2021-07-13 20:37:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10419 states, 10418 states have (on average 3.7977538875023997) internal successors, (39565), 10418 states have internal predecessors, (39565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 39565 transitions. [2021-07-13 20:37:50,842 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 39565 transitions. Word has length 28 [2021-07-13 20:37:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:50,842 INFO L482 AbstractCegarLoop]: Abstraction has 10419 states and 39565 transitions. [2021-07-13 20:37:50,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 39565 transitions. [2021-07-13 20:37:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:50,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:50,864 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:51,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-07-13 20:37:51,068 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-07-13 20:37:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:51,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819877863] [2021-07-13 20:37:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:51,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819877863] [2021-07-13 20:37:51,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819877863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:51,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979616268] [2021-07-13 20:37:51,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:51,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:37:51,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:51,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:51,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:51,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979616268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:51,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:51,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:37:51,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749653033] [2021-07-13 20:37:51,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:51,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:51,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:51,206 INFO L87 Difference]: Start difference. First operand 10419 states and 39565 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:52,297 INFO L93 Difference]: Finished difference Result 19333 states and 68102 transitions. [2021-07-13 20:37:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:37:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:37:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:52,346 INFO L225 Difference]: With dead ends: 19333 [2021-07-13 20:37:52,346 INFO L226 Difference]: Without dead ends: 19321 [2021-07-13 20:37:52,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 617.9ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:37:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19321 states. [2021-07-13 20:37:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19321 to 10233. [2021-07-13 20:37:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10233 states, 10232 states have (on average 3.8045347928068804) internal successors, (38928), 10232 states have internal predecessors, (38928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10233 states to 10233 states and 38928 transitions. [2021-07-13 20:37:52,681 INFO L78 Accepts]: Start accepts. Automaton has 10233 states and 38928 transitions. Word has length 28 [2021-07-13 20:37:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:52,681 INFO L482 AbstractCegarLoop]: Abstraction has 10233 states and 38928 transitions. [2021-07-13 20:37:52,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10233 states and 38928 transitions. [2021-07-13 20:37:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:52,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:52,828 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:53,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:53,044 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:53,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:53,045 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-07-13 20:37:53,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:53,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232280280] [2021-07-13 20:37:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:53,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232280280] [2021-07-13 20:37:53,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232280280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636023453] [2021-07-13 20:37:53,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:53,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:37:53,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:53,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:53,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636023453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:53,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:53,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:37:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914838164] [2021-07-13 20:37:53,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:37:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:37:53,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:37:53,176 INFO L87 Difference]: Start difference. First operand 10233 states and 38928 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:54,179 INFO L93 Difference]: Finished difference Result 19147 states and 67441 transitions. [2021-07-13 20:37:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:37:54,180 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:37:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:54,224 INFO L225 Difference]: With dead ends: 19147 [2021-07-13 20:37:54,225 INFO L226 Difference]: Without dead ends: 19111 [2021-07-13 20:37:54,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:37:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19111 states. [2021-07-13 20:37:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19111 to 10277. [2021-07-13 20:37:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.802646944336318) internal successors, (39076), 10276 states have internal predecessors, (39076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39076 transitions. [2021-07-13 20:37:54,524 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39076 transitions. Word has length 28 [2021-07-13 20:37:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:54,524 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 39076 transitions. [2021-07-13 20:37:54,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39076 transitions. [2021-07-13 20:37:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:54,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:54,542 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:54,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:54,758 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-07-13 20:37:54,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:54,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086584144] [2021-07-13 20:37:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:54,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:54,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086584144] [2021-07-13 20:37:54,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086584144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:54,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045891269] [2021-07-13 20:37:54,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:54,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:54,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:54,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045891269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:54,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:54,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:37:54,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650949918] [2021-07-13 20:37:54,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:37:54,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:37:54,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:54,936 INFO L87 Difference]: Start difference. First operand 10277 states and 39076 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:56,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:56,406 INFO L93 Difference]: Finished difference Result 19074 states and 67295 transitions. [2021-07-13 20:37:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:37:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:56,454 INFO L225 Difference]: With dead ends: 19074 [2021-07-13 20:37:56,454 INFO L226 Difference]: Without dead ends: 19074 [2021-07-13 20:37:56,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 920.3ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:37:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19074 states. [2021-07-13 20:37:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19074 to 10473. [2021-07-13 20:37:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10473 states, 10472 states have (on average 3.793544690603514) internal successors, (39726), 10472 states have internal predecessors, (39726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10473 states to 10473 states and 39726 transitions. [2021-07-13 20:37:56,753 INFO L78 Accepts]: Start accepts. Automaton has 10473 states and 39726 transitions. Word has length 28 [2021-07-13 20:37:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:56,753 INFO L482 AbstractCegarLoop]: Abstraction has 10473 states and 39726 transitions. [2021-07-13 20:37:56,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand 10473 states and 39726 transitions. [2021-07-13 20:37:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:56,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:56,771 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:56,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:56,986 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:56,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-07-13 20:37:56,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:56,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754857669] [2021-07-13 20:37:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:57,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754857669] [2021-07-13 20:37:57,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754857669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753164076] [2021-07-13 20:37:57,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:57,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:57,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:57,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753164076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:57,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:57,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:37:57,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669942120] [2021-07-13 20:37:57,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:37:57,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:57,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:37:57,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:57,119 INFO L87 Difference]: Start difference. First operand 10473 states and 39726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:58,381 INFO L93 Difference]: Finished difference Result 18684 states and 66217 transitions. [2021-07-13 20:37:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:37:58,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:37:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:58,434 INFO L225 Difference]: With dead ends: 18684 [2021-07-13 20:37:58,434 INFO L226 Difference]: Without dead ends: 18672 [2021-07-13 20:37:58,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 754.4ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:37:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18672 states. [2021-07-13 20:37:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18672 to 10355. [2021-07-13 20:37:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10355 states, 10354 states have (on average 3.7980490631639947) internal successors, (39325), 10354 states have internal predecessors, (39325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 39325 transitions. [2021-07-13 20:37:58,774 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 39325 transitions. Word has length 28 [2021-07-13 20:37:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:58,775 INFO L482 AbstractCegarLoop]: Abstraction has 10355 states and 39325 transitions. [2021-07-13 20:37:58,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 39325 transitions. [2021-07-13 20:37:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:37:58,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:58,793 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:37:59,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4006 [2021-07-13 20:37:59,008 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-07-13 20:37:59,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:59,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128741534] [2021-07-13 20:37:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:59,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:59,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128741534] [2021-07-13 20:37:59,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128741534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:59,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154812304] [2021-07-13 20:37:59,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:59,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:37:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:37:59,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:59,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154812304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:59,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:59,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:37:59,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32939779] [2021-07-13 20:37:59,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:37:59,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:37:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:37:59,135 INFO L87 Difference]: Start difference. First operand 10355 states and 39325 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:00,167 INFO L93 Difference]: Finished difference Result 17924 states and 64133 transitions. [2021-07-13 20:38:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:38:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:00,270 INFO L225 Difference]: With dead ends: 17924 [2021-07-13 20:38:00,271 INFO L226 Difference]: Without dead ends: 17888 [2021-07-13 20:38:00,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 570.9ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:38:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17888 states. [2021-07-13 20:38:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17888 to 10379. [2021-07-13 20:38:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 3.7969743688571977) internal successors, (39405), 10378 states have internal predecessors, (39405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 39405 transitions. [2021-07-13 20:38:00,558 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 39405 transitions. Word has length 28 [2021-07-13 20:38:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:00,558 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 39405 transitions. [2021-07-13 20:38:00,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 39405 transitions. [2021-07-13 20:38:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:00,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:00,576 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:00,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:00,789 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-07-13 20:38:00,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:00,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305295878] [2021-07-13 20:38:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:00,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:00,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305295878] [2021-07-13 20:38:00,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305295878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:00,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780975061] [2021-07-13 20:38:00,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:00,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:00,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780975061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:00,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:00,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:38:00,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925047805] [2021-07-13 20:38:00,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:00,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:00,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:00,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:00,938 INFO L87 Difference]: Start difference. First operand 10379 states and 39405 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:02,234 INFO L93 Difference]: Finished difference Result 26041 states and 92685 transitions. [2021-07-13 20:38:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:38:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-13 20:38:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:02,326 INFO L225 Difference]: With dead ends: 26041 [2021-07-13 20:38:02,326 INFO L226 Difference]: Without dead ends: 26041 [2021-07-13 20:38:02,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 713.5ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:38:02,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26041 states. [2021-07-13 20:38:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26041 to 10669. [2021-07-13 20:38:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 3.8225534308211473) internal successors, (40779), 10668 states have internal predecessors, (40779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 40779 transitions. [2021-07-13 20:38:02,814 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 40779 transitions. Word has length 28 [2021-07-13 20:38:02,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:02,814 INFO L482 AbstractCegarLoop]: Abstraction has 10669 states and 40779 transitions. [2021-07-13 20:38:02,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 40779 transitions. [2021-07-13 20:38:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:02,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:02,832 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:03,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4008 [2021-07-13 20:38:03,048 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:03,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-07-13 20:38:03,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:03,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174685335] [2021-07-13 20:38:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:03,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:03,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174685335] [2021-07-13 20:38:03,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174685335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:03,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106766657] [2021-07-13 20:38:03,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:03,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:38:03,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:03,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:03,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:03,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106766657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:03,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:03,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:38:03,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533330392] [2021-07-13 20:38:03,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:03,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:03,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:03,200 INFO L87 Difference]: Start difference. First operand 10669 states and 40779 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:04,347 INFO L93 Difference]: Finished difference Result 25481 states and 91317 transitions. [2021-07-13 20:38:04,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:38:04,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-13 20:38:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:04,449 INFO L225 Difference]: With dead ends: 25481 [2021-07-13 20:38:04,449 INFO L226 Difference]: Without dead ends: 25481 [2021-07-13 20:38:04,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 644.9ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:38:04,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25481 states. [2021-07-13 20:38:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25481 to 10571. [2021-07-13 20:38:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.809744560075686) internal successors, (40269), 10570 states have internal predecessors, (40269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 40269 transitions. [2021-07-13 20:38:04,902 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 40269 transitions. Word has length 28 [2021-07-13 20:38:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:04,902 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 40269 transitions. [2021-07-13 20:38:04,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 40269 transitions. [2021-07-13 20:38:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:04,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:04,921 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:05,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:05,137 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-07-13 20:38:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:05,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155990872] [2021-07-13 20:38:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:05,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:05,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155990872] [2021-07-13 20:38:05,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155990872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:05,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854662688] [2021-07-13 20:38:05,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:05,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:38:05,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:05,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:05,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:05,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854662688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:05,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:05,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:38:05,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661406372] [2021-07-13 20:38:05,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:38:05,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:05,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:38:05,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:38:05,304 INFO L87 Difference]: Start difference. First operand 10571 states and 40269 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-07-13 20:38:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:06,187 INFO L93 Difference]: Finished difference Result 20226 states and 72726 transitions. [2021-07-13 20:38:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:38:06,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 28 [2021-07-13 20:38:06,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:06,236 INFO L225 Difference]: With dead ends: 20226 [2021-07-13 20:38:06,236 INFO L226 Difference]: Without dead ends: 20226 [2021-07-13 20:38:06,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:38:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20226 states. [2021-07-13 20:38:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20226 to 10580. [2021-07-13 20:38:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 3.8086775687683145) internal successors, (40292), 10579 states have internal predecessors, (40292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 40292 transitions. [2021-07-13 20:38:06,700 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 40292 transitions. Word has length 28 [2021-07-13 20:38:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:06,700 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 40292 transitions. [2021-07-13 20:38:06,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-07-13 20:38:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 40292 transitions. [2021-07-13 20:38:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:06,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:06,719 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:06,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-07-13 20:38:06,937 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:06,937 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-07-13 20:38:06,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:06,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075096766] [2021-07-13 20:38:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:06,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:06,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075096766] [2021-07-13 20:38:06,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075096766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:06,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575332508] [2021-07-13 20:38:06,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:07,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:07,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575332508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:07,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:07,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:38:07,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412243958] [2021-07-13 20:38:07,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:38:07,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:07,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:38:07,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:38:07,103 INFO L87 Difference]: Start difference. First operand 10580 states and 40292 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:07,992 INFO L93 Difference]: Finished difference Result 18775 states and 68086 transitions. [2021-07-13 20:38:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:38:07,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:08,047 INFO L225 Difference]: With dead ends: 18775 [2021-07-13 20:38:08,047 INFO L226 Difference]: Without dead ends: 18775 [2021-07-13 20:38:08,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:38:08,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-07-13 20:38:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10592. [2021-07-13 20:38:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.807950146350675) internal successors, (40330), 10591 states have internal predecessors, (40330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40330 transitions. [2021-07-13 20:38:08,412 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40330 transitions. Word has length 28 [2021-07-13 20:38:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:08,412 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40330 transitions. [2021-07-13 20:38:08,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40330 transitions. [2021-07-13 20:38:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:08,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:08,430 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:08,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-07-13 20:38:08,645 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-07-13 20:38:08,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:08,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953458016] [2021-07-13 20:38:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:08,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:08,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953458016] [2021-07-13 20:38:08,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953458016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:08,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357280176] [2021-07-13 20:38:08,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:08,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357280176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:08,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:08,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:38:08,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896566592] [2021-07-13 20:38:08,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:08,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:08,765 INFO L87 Difference]: Start difference. First operand 10592 states and 40330 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:09,575 INFO L93 Difference]: Finished difference Result 19382 states and 69829 transitions. [2021-07-13 20:38:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:38:09,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:09,621 INFO L225 Difference]: With dead ends: 19382 [2021-07-13 20:38:09,621 INFO L226 Difference]: Without dead ends: 19382 [2021-07-13 20:38:09,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 448.3ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:38:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19382 states. [2021-07-13 20:38:09,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19382 to 10700. [2021-07-13 20:38:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10699 states have (on average 3.800729040097205) internal successors, (40664), 10699 states have internal predecessors, (40664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 40664 transitions. [2021-07-13 20:38:09,939 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 40664 transitions. Word has length 28 [2021-07-13 20:38:09,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:09,939 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 40664 transitions. [2021-07-13 20:38:09,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 40664 transitions. [2021-07-13 20:38:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:09,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:09,957 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:10,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-07-13 20:38:10,173 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-07-13 20:38:10,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:10,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668522253] [2021-07-13 20:38:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:10,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:10,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668522253] [2021-07-13 20:38:10,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668522253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:10,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000295240] [2021-07-13 20:38:10,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:10,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:38:10,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:10,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:10,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000295240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:10,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:10,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:38:10,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126780304] [2021-07-13 20:38:10,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:10,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:10,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:10,304 INFO L87 Difference]: Start difference. First operand 10700 states and 40664 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:11,159 INFO L93 Difference]: Finished difference Result 18954 states and 68665 transitions. [2021-07-13 20:38:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:38:11,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:11,205 INFO L225 Difference]: With dead ends: 18954 [2021-07-13 20:38:11,205 INFO L226 Difference]: Without dead ends: 18950 [2021-07-13 20:38:11,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 484.8ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:38:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18950 states. [2021-07-13 20:38:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18950 to 10626. [2021-07-13 20:38:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10626 states, 10625 states have (on average 3.804705882352941) internal successors, (40425), 10625 states have internal predecessors, (40425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10626 states to 10626 states and 40425 transitions. [2021-07-13 20:38:11,516 INFO L78 Accepts]: Start accepts. Automaton has 10626 states and 40425 transitions. Word has length 28 [2021-07-13 20:38:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:11,516 INFO L482 AbstractCegarLoop]: Abstraction has 10626 states and 40425 transitions. [2021-07-13 20:38:11,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 10626 states and 40425 transitions. [2021-07-13 20:38:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:11,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:11,599 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:11,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-07-13 20:38:11,809 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-07-13 20:38:11,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:11,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840136076] [2021-07-13 20:38:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:11,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:11,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840136076] [2021-07-13 20:38:11,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840136076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:11,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540085137] [2021-07-13 20:38:11,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:11,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:11,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:11,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540085137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:11,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:11,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:38:11,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288995504] [2021-07-13 20:38:11,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:11,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:11,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:11,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:11,956 INFO L87 Difference]: Start difference. First operand 10626 states and 40425 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:12,983 INFO L93 Difference]: Finished difference Result 18381 states and 66150 transitions. [2021-07-13 20:38:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:38:12,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:13,034 INFO L225 Difference]: With dead ends: 18381 [2021-07-13 20:38:13,034 INFO L226 Difference]: Without dead ends: 18381 [2021-07-13 20:38:13,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:38:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18381 states. [2021-07-13 20:38:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18381 to 10853. [2021-07-13 20:38:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10853 states, 10852 states have (on average 3.807869517139698) internal successors, (41323), 10852 states have internal predecessors, (41323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10853 states to 10853 states and 41323 transitions. [2021-07-13 20:38:13,362 INFO L78 Accepts]: Start accepts. Automaton has 10853 states and 41323 transitions. Word has length 28 [2021-07-13 20:38:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:13,362 INFO L482 AbstractCegarLoop]: Abstraction has 10853 states and 41323 transitions. [2021-07-13 20:38:13,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10853 states and 41323 transitions. [2021-07-13 20:38:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:13,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:13,381 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:13,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:13,597 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-07-13 20:38:13,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:13,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061223109] [2021-07-13 20:38:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:13,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:13,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061223109] [2021-07-13 20:38:13,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061223109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:13,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304509262] [2021-07-13 20:38:13,632 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:13,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:38:13,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:13,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:13,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:13,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304509262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:13,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:13,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:38:13,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969675688] [2021-07-13 20:38:13,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:13,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:13,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:13,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:13,732 INFO L87 Difference]: Start difference. First operand 10853 states and 41323 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:14,757 INFO L93 Difference]: Finished difference Result 18091 states and 65344 transitions. [2021-07-13 20:38:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:38:14,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:14,797 INFO L225 Difference]: With dead ends: 18091 [2021-07-13 20:38:14,797 INFO L226 Difference]: Without dead ends: 18079 [2021-07-13 20:38:14,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:38:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18079 states. [2021-07-13 20:38:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18079 to 10955. [2021-07-13 20:38:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 10954 states have (on average 3.8018988497352564) internal successors, (41646), 10954 states have internal predecessors, (41646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 41646 transitions. [2021-07-13 20:38:15,081 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 41646 transitions. Word has length 28 [2021-07-13 20:38:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:15,081 INFO L482 AbstractCegarLoop]: Abstraction has 10955 states and 41646 transitions. [2021-07-13 20:38:15,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 41646 transitions. [2021-07-13 20:38:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:15,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:15,100 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:15,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:15,316 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:15,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 71 times [2021-07-13 20:38:15,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:15,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364805237] [2021-07-13 20:38:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:15,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:15,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364805237] [2021-07-13 20:38:15,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364805237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:15,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591365440] [2021-07-13 20:38:15,354 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:15,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:38:15,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:15,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:15,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:15,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591365440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:15,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:15,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:38:15,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048330704] [2021-07-13 20:38:15,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:15,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:15,448 INFO L87 Difference]: Start difference. First operand 10955 states and 41646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:15,898 INFO L93 Difference]: Finished difference Result 15599 states and 57718 transitions. [2021-07-13 20:38:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:38:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:38:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:15,934 INFO L225 Difference]: With dead ends: 15599 [2021-07-13 20:38:15,935 INFO L226 Difference]: Without dead ends: 15599 [2021-07-13 20:38:15,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:38:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15599 states. [2021-07-13 20:38:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15599 to 11027. [2021-07-13 20:38:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11027 states, 11026 states have (on average 3.7972066025757303) internal successors, (41868), 11026 states have internal predecessors, (41868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11027 states to 11027 states and 41868 transitions. [2021-07-13 20:38:16,177 INFO L78 Accepts]: Start accepts. Automaton has 11027 states and 41868 transitions. Word has length 28 [2021-07-13 20:38:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:16,177 INFO L482 AbstractCegarLoop]: Abstraction has 11027 states and 41868 transitions. [2021-07-13 20:38:16,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 11027 states and 41868 transitions. [2021-07-13 20:38:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:16,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:16,195 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:16,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:16,409 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 72 times [2021-07-13 20:38:16,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:16,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068074194] [2021-07-13 20:38:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:16,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:16,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068074194] [2021-07-13 20:38:16,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068074194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:16,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675104319] [2021-07-13 20:38:16,441 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:16,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:38:16,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:16,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675104319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:16,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:16,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:38:16,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642465624] [2021-07-13 20:38:16,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:38:16,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:16,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:38:16,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:16,527 INFO L87 Difference]: Start difference. First operand 11027 states and 41868 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:17,148 INFO L93 Difference]: Finished difference Result 16567 states and 60532 transitions. [2021-07-13 20:38:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:38:17,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:38:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:17,185 INFO L225 Difference]: With dead ends: 16567 [2021-07-13 20:38:17,186 INFO L226 Difference]: Without dead ends: 16567 [2021-07-13 20:38:17,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:38:17,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16567 states. [2021-07-13 20:38:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16567 to 11355. [2021-07-13 20:38:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 3.779284833538841) internal successors, (42910), 11354 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 42910 transitions. [2021-07-13 20:38:17,436 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 42910 transitions. Word has length 28 [2021-07-13 20:38:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:17,437 INFO L482 AbstractCegarLoop]: Abstraction has 11355 states and 42910 transitions. [2021-07-13 20:38:17,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 42910 transitions. [2021-07-13 20:38:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:17,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:17,455 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:17,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:17,668 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 73 times [2021-07-13 20:38:17,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:17,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127278700] [2021-07-13 20:38:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:17,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:17,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127278700] [2021-07-13 20:38:17,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127278700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:17,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176992484] [2021-07-13 20:38:17,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:17,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:17,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176992484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:17,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:17,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:38:17,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897872266] [2021-07-13 20:38:17,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:17,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:17,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:17,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:17,821 INFO L87 Difference]: Start difference. First operand 11355 states and 42910 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:18,357 INFO L93 Difference]: Finished difference Result 16375 states and 60421 transitions. [2021-07-13 20:38:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:38:18,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-07-13 20:38:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:18,397 INFO L225 Difference]: With dead ends: 16375 [2021-07-13 20:38:18,397 INFO L226 Difference]: Without dead ends: 16331 [2021-07-13 20:38:18,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:38:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-07-13 20:38:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 13242. [2021-07-13 20:38:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13242 states, 13241 states have (on average 3.819726606751756) internal successors, (50577), 13241 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13242 states to 13242 states and 50577 transitions. [2021-07-13 20:38:18,689 INFO L78 Accepts]: Start accepts. Automaton has 13242 states and 50577 transitions. Word has length 28 [2021-07-13 20:38:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:18,689 INFO L482 AbstractCegarLoop]: Abstraction has 13242 states and 50577 transitions. [2021-07-13 20:38:18,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 13242 states and 50577 transitions. [2021-07-13 20:38:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:18,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:18,714 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:18,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:18,929 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 74 times [2021-07-13 20:38:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:18,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826485246] [2021-07-13 20:38:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:18,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:18,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826485246] [2021-07-13 20:38:18,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826485246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:18,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646047826] [2021-07-13 20:38:18,961 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:18,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:18,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:18,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:19,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646047826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:19,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:19,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:38:19,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087095958] [2021-07-13 20:38:19,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:38:19,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:19,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:38:19,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:19,040 INFO L87 Difference]: Start difference. First operand 13242 states and 50577 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:19,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:19,511 INFO L93 Difference]: Finished difference Result 18146 states and 67670 transitions. [2021-07-13 20:38:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:38:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:38:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:19,561 INFO L225 Difference]: With dead ends: 18146 [2021-07-13 20:38:19,561 INFO L226 Difference]: Without dead ends: 18138 [2021-07-13 20:38:19,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:38:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18138 states. [2021-07-13 20:38:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18138 to 13160. [2021-07-13 20:38:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 3.8226308990044835) internal successors, (50302), 13159 states have internal predecessors, (50302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 50302 transitions. [2021-07-13 20:38:19,891 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 50302 transitions. Word has length 28 [2021-07-13 20:38:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:19,891 INFO L482 AbstractCegarLoop]: Abstraction has 13160 states and 50302 transitions. [2021-07-13 20:38:19,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:19,892 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 50302 transitions. [2021-07-13 20:38:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:19,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:19,917 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:20,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:20,133 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 75 times [2021-07-13 20:38:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:20,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387179639] [2021-07-13 20:38:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:20,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387179639] [2021-07-13 20:38:20,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387179639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602391814] [2021-07-13 20:38:20,167 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:20,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:38:20,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:20,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:20,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602391814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:20,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:20,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:38:20,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421510583] [2021-07-13 20:38:20,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:20,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:20,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:20,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:20,244 INFO L87 Difference]: Start difference. First operand 13160 states and 50302 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:20,683 INFO L93 Difference]: Finished difference Result 18024 states and 67311 transitions. [2021-07-13 20:38:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:38:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:38:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:20,735 INFO L225 Difference]: With dead ends: 18024 [2021-07-13 20:38:20,735 INFO L226 Difference]: Without dead ends: 18012 [2021-07-13 20:38:20,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:38:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-07-13 20:38:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 13126. [2021-07-13 20:38:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13126 states, 13125 states have (on average 3.8246857142857142) internal successors, (50199), 13125 states have internal predecessors, (50199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13126 states to 13126 states and 50199 transitions. [2021-07-13 20:38:21,070 INFO L78 Accepts]: Start accepts. Automaton has 13126 states and 50199 transitions. Word has length 28 [2021-07-13 20:38:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:21,070 INFO L482 AbstractCegarLoop]: Abstraction has 13126 states and 50199 transitions. [2021-07-13 20:38:21,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 13126 states and 50199 transitions. [2021-07-13 20:38:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:21,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:21,096 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:21,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-07-13 20:38:21,311 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:21,312 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 76 times [2021-07-13 20:38:21,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:21,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676776268] [2021-07-13 20:38:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:21,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:21,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676776268] [2021-07-13 20:38:21,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676776268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:21,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091795947] [2021-07-13 20:38:21,342 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:21,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:21,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:21,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:21,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:21,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091795947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:21,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:21,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:38:21,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936486654] [2021-07-13 20:38:21,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:38:21,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:21,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:38:21,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:38:21,449 INFO L87 Difference]: Start difference. First operand 13126 states and 50199 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:22,411 INFO L93 Difference]: Finished difference Result 24612 states and 88773 transitions. [2021-07-13 20:38:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:38:22,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 28 [2021-07-13 20:38:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:22,477 INFO L225 Difference]: With dead ends: 24612 [2021-07-13 20:38:22,477 INFO L226 Difference]: Without dead ends: 24612 [2021-07-13 20:38:22,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:38:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24612 states. [2021-07-13 20:38:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24612 to 13108. [2021-07-13 20:38:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 3.8236057068741895) internal successors, (50116), 13107 states have internal predecessors, (50116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 50116 transitions. [2021-07-13 20:38:22,845 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 50116 transitions. Word has length 28 [2021-07-13 20:38:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:22,845 INFO L482 AbstractCegarLoop]: Abstraction has 13108 states and 50116 transitions. [2021-07-13 20:38:22,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 50116 transitions. [2021-07-13 20:38:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:22,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:22,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:23,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-07-13 20:38:23,084 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-07-13 20:38:23,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:23,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160178208] [2021-07-13 20:38:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:23,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:23,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160178208] [2021-07-13 20:38:23,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160178208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:23,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381761719] [2021-07-13 20:38:23,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:23,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:38:23,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:23,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:23,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381761719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:23,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:23,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:38:23,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287629252] [2021-07-13 20:38:23,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:38:23,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:38:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:38:23,224 INFO L87 Difference]: Start difference. First operand 13108 states and 50116 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:23,932 INFO L93 Difference]: Finished difference Result 20270 states and 73737 transitions. [2021-07-13 20:38:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:38:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:23,980 INFO L225 Difference]: With dead ends: 20270 [2021-07-13 20:38:23,981 INFO L226 Difference]: Without dead ends: 20257 [2021-07-13 20:38:23,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:38:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20257 states. [2021-07-13 20:38:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20257 to 14410. [2021-07-13 20:38:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14410 states, 14409 states have (on average 3.8785481296411963) internal successors, (55886), 14409 states have internal predecessors, (55886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 55886 transitions. [2021-07-13 20:38:24,489 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 55886 transitions. Word has length 28 [2021-07-13 20:38:24,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:24,489 INFO L482 AbstractCegarLoop]: Abstraction has 14410 states and 55886 transitions. [2021-07-13 20:38:24,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 55886 transitions. [2021-07-13 20:38:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:24,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:24,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:24,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-07-13 20:38:24,728 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:24,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:24,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-07-13 20:38:24,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:24,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566751992] [2021-07-13 20:38:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:24,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:24,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566751992] [2021-07-13 20:38:24,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566751992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:24,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800095112] [2021-07-13 20:38:24,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:24,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:24,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:24,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800095112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:24,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:24,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:38:24,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134478917] [2021-07-13 20:38:24,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:38:24,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:24,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:38:24,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:38:24,870 INFO L87 Difference]: Start difference. First operand 14410 states and 55886 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:25,612 INFO L93 Difference]: Finished difference Result 20362 states and 73979 transitions. [2021-07-13 20:38:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:38:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:25,660 INFO L225 Difference]: With dead ends: 20362 [2021-07-13 20:38:25,660 INFO L226 Difference]: Without dead ends: 20356 [2021-07-13 20:38:25,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:38:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-07-13 20:38:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 14386. [2021-07-13 20:38:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14386 states, 14385 states have (on average 3.877650330205075) internal successors, (55780), 14385 states have internal predecessors, (55780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14386 states to 14386 states and 55780 transitions. [2021-07-13 20:38:26,049 INFO L78 Accepts]: Start accepts. Automaton has 14386 states and 55780 transitions. Word has length 28 [2021-07-13 20:38:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:26,049 INFO L482 AbstractCegarLoop]: Abstraction has 14386 states and 55780 transitions. [2021-07-13 20:38:26,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 14386 states and 55780 transitions. [2021-07-13 20:38:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:26,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:26,076 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:26,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-07-13 20:38:26,296 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:26,296 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-07-13 20:38:26,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:26,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798586244] [2021-07-13 20:38:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:26,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:26,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798586244] [2021-07-13 20:38:26,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798586244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:26,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689343916] [2021-07-13 20:38:26,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:26,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:26,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:26,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:26,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:26,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689343916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:26,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:26,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:38:26,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087891379] [2021-07-13 20:38:26,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:26,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:26,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:26,415 INFO L87 Difference]: Start difference. First operand 14386 states and 55780 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:27,167 INFO L93 Difference]: Finished difference Result 23158 states and 84169 transitions. [2021-07-13 20:38:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:38:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:38:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:27,232 INFO L225 Difference]: With dead ends: 23158 [2021-07-13 20:38:27,232 INFO L226 Difference]: Without dead ends: 23145 [2021-07-13 20:38:27,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:38:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23145 states. [2021-07-13 20:38:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23145 to 14458. [2021-07-13 20:38:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14458 states, 14457 states have (on average 3.882548246524175) internal successors, (56130), 14457 states have internal predecessors, (56130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14458 states to 14458 states and 56130 transitions. [2021-07-13 20:38:27,719 INFO L78 Accepts]: Start accepts. Automaton has 14458 states and 56130 transitions. Word has length 28 [2021-07-13 20:38:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:27,719 INFO L482 AbstractCegarLoop]: Abstraction has 14458 states and 56130 transitions. [2021-07-13 20:38:27,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 14458 states and 56130 transitions. [2021-07-13 20:38:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:27,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:27,744 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:27,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-07-13 20:38:27,960 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:27,960 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-07-13 20:38:27,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:27,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114885016] [2021-07-13 20:38:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:27,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:27,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114885016] [2021-07-13 20:38:27,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114885016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:27,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502281208] [2021-07-13 20:38:27,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:28,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:28,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502281208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:28,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:28,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:38:28,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260134103] [2021-07-13 20:38:28,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:28,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:28,091 INFO L87 Difference]: Start difference. First operand 14458 states and 56130 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:28,804 INFO L93 Difference]: Finished difference Result 24792 states and 89366 transitions. [2021-07-13 20:38:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:38:28,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:38:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:28,870 INFO L225 Difference]: With dead ends: 24792 [2021-07-13 20:38:28,870 INFO L226 Difference]: Without dead ends: 24792 [2021-07-13 20:38:28,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:38:28,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24792 states. [2021-07-13 20:38:29,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24792 to 14502. [2021-07-13 20:38:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14502 states, 14501 states have (on average 3.8793876284394178) internal successors, (56255), 14501 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14502 states to 14502 states and 56255 transitions. [2021-07-13 20:38:29,285 INFO L78 Accepts]: Start accepts. Automaton has 14502 states and 56255 transitions. Word has length 28 [2021-07-13 20:38:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:29,285 INFO L482 AbstractCegarLoop]: Abstraction has 14502 states and 56255 transitions. [2021-07-13 20:38:29,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 14502 states and 56255 transitions. [2021-07-13 20:38:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:29,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:29,310 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:29,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:29,526 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:29,526 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 77 times [2021-07-13 20:38:29,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:29,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364413758] [2021-07-13 20:38:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:29,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364413758] [2021-07-13 20:38:29,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364413758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569112025] [2021-07-13 20:38:29,557 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:29,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:38:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:29,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:29,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:29,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569112025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:29,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:29,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:38:29,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162298266] [2021-07-13 20:38:29,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:38:29,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:38:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:38:29,794 INFO L87 Difference]: Start difference. First operand 14502 states and 56255 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:30,729 INFO L93 Difference]: Finished difference Result 24486 states and 90901 transitions. [2021-07-13 20:38:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:38:30,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-13 20:38:30,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:30,791 INFO L225 Difference]: With dead ends: 24486 [2021-07-13 20:38:30,792 INFO L226 Difference]: Without dead ends: 24482 [2021-07-13 20:38:30,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 516.3ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:38:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24482 states. [2021-07-13 20:38:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24482 to 14756. [2021-07-13 20:38:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14756 states, 14755 states have (on average 3.869739071501186) internal successors, (57098), 14755 states have internal predecessors, (57098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14756 states to 14756 states and 57098 transitions. [2021-07-13 20:38:31,218 INFO L78 Accepts]: Start accepts. Automaton has 14756 states and 57098 transitions. Word has length 28 [2021-07-13 20:38:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:31,219 INFO L482 AbstractCegarLoop]: Abstraction has 14756 states and 57098 transitions. [2021-07-13 20:38:31,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14756 states and 57098 transitions. [2021-07-13 20:38:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:31,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:31,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:31,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:31,460 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:31,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:31,460 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-07-13 20:38:31,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:31,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968924865] [2021-07-13 20:38:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:31,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:31,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968924865] [2021-07-13 20:38:31,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968924865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:31,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383225340] [2021-07-13 20:38:31,487 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:31,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:31,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:31,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383225340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:31,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:31,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:38:31,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390603295] [2021-07-13 20:38:31,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:31,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:31,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:31,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:31,587 INFO L87 Difference]: Start difference. First operand 14756 states and 57098 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:32,265 INFO L93 Difference]: Finished difference Result 21631 states and 80082 transitions. [2021-07-13 20:38:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:38:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:32,319 INFO L225 Difference]: With dead ends: 21631 [2021-07-13 20:38:32,319 INFO L226 Difference]: Without dead ends: 21608 [2021-07-13 20:38:32,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:38:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21608 states. [2021-07-13 20:38:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21608 to 15111. [2021-07-13 20:38:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15111 states, 15110 states have (on average 3.888682991396426) internal successors, (58758), 15110 states have internal predecessors, (58758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15111 states to 15111 states and 58758 transitions. [2021-07-13 20:38:32,748 INFO L78 Accepts]: Start accepts. Automaton has 15111 states and 58758 transitions. Word has length 28 [2021-07-13 20:38:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:32,748 INFO L482 AbstractCegarLoop]: Abstraction has 15111 states and 58758 transitions. [2021-07-13 20:38:32,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 15111 states and 58758 transitions. [2021-07-13 20:38:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:32,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:32,773 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:32,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4027 [2021-07-13 20:38:32,989 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:32,989 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-07-13 20:38:32,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:32,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686774722] [2021-07-13 20:38:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:33,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:33,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686774722] [2021-07-13 20:38:33,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686774722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:33,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581491271] [2021-07-13 20:38:33,019 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:33,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:33,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:33,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:33,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581491271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:33,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:33,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:38:33,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961588158] [2021-07-13 20:38:33,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:33,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:33,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:33,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:33,130 INFO L87 Difference]: Start difference. First operand 15111 states and 58758 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:33,856 INFO L93 Difference]: Finished difference Result 21728 states and 79303 transitions. [2021-07-13 20:38:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:38:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:33,910 INFO L225 Difference]: With dead ends: 21728 [2021-07-13 20:38:33,910 INFO L226 Difference]: Without dead ends: 21728 [2021-07-13 20:38:33,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:38:33,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21728 states. [2021-07-13 20:38:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21728 to 15230. [2021-07-13 20:38:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15230 states, 15229 states have (on average 3.880753824939261) internal successors, (59100), 15229 states have internal predecessors, (59100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15230 states to 15230 states and 59100 transitions. [2021-07-13 20:38:34,283 INFO L78 Accepts]: Start accepts. Automaton has 15230 states and 59100 transitions. Word has length 28 [2021-07-13 20:38:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:34,284 INFO L482 AbstractCegarLoop]: Abstraction has 15230 states and 59100 transitions. [2021-07-13 20:38:34,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 15230 states and 59100 transitions. [2021-07-13 20:38:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:34,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:34,312 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:34,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:34,528 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:34,528 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-07-13 20:38:34,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:34,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981859671] [2021-07-13 20:38:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:34,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981859671] [2021-07-13 20:38:34,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981859671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122273008] [2021-07-13 20:38:34,559 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:34,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:38:34,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:34,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:34,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122273008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:34,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:34,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:38:34,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361084656] [2021-07-13 20:38:34,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:38:34,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:38:34,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:38:34,659 INFO L87 Difference]: Start difference. First operand 15230 states and 59100 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:35,347 INFO L93 Difference]: Finished difference Result 24246 states and 88914 transitions. [2021-07-13 20:38:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:38:35,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:35,418 INFO L225 Difference]: With dead ends: 24246 [2021-07-13 20:38:35,418 INFO L226 Difference]: Without dead ends: 24246 [2021-07-13 20:38:35,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:38:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24246 states. [2021-07-13 20:38:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24246 to 16389. [2021-07-13 20:38:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 16388 states have (on average 3.862521357090554) internal successors, (63299), 16388 states have internal predecessors, (63299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 63299 transitions. [2021-07-13 20:38:35,937 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 63299 transitions. Word has length 28 [2021-07-13 20:38:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:35,937 INFO L482 AbstractCegarLoop]: Abstraction has 16389 states and 63299 transitions. [2021-07-13 20:38:35,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 63299 transitions. [2021-07-13 20:38:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:35,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:35,964 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:36,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:36,177 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:36,177 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-07-13 20:38:36,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:36,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042590542] [2021-07-13 20:38:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:36,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:36,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042590542] [2021-07-13 20:38:36,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042590542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:36,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192917405] [2021-07-13 20:38:36,206 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:36,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192917405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:36,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:36,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:38:36,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260687246] [2021-07-13 20:38:36,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:38:36,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:36,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:38:36,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:38:36,316 INFO L87 Difference]: Start difference. First operand 16389 states and 63299 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:37,196 INFO L93 Difference]: Finished difference Result 27385 states and 99086 transitions. [2021-07-13 20:38:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:38:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-13 20:38:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:37,271 INFO L225 Difference]: With dead ends: 27385 [2021-07-13 20:38:37,271 INFO L226 Difference]: Without dead ends: 27385 [2021-07-13 20:38:37,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:38:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27385 states. [2021-07-13 20:38:37,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27385 to 16619. [2021-07-13 20:38:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16619 states, 16618 states have (on average 3.8775424238777227) internal successors, (64437), 16618 states have internal predecessors, (64437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16619 states to 16619 states and 64437 transitions. [2021-07-13 20:38:37,718 INFO L78 Accepts]: Start accepts. Automaton has 16619 states and 64437 transitions. Word has length 28 [2021-07-13 20:38:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:37,718 INFO L482 AbstractCegarLoop]: Abstraction has 16619 states and 64437 transitions. [2021-07-13 20:38:37,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 16619 states and 64437 transitions. [2021-07-13 20:38:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:37,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:37,748 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:37,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-07-13 20:38:37,963 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 78 times [2021-07-13 20:38:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:37,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989138251] [2021-07-13 20:38:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:38,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:38,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989138251] [2021-07-13 20:38:38,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989138251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:38,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558604547] [2021-07-13 20:38:38,002 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:38,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:38:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:38,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:38,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558604547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:38,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:38,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:38:38,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50617585] [2021-07-13 20:38:38,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:38,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:38,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:38,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:38,138 INFO L87 Difference]: Start difference. First operand 16619 states and 64437 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:39,705 INFO L93 Difference]: Finished difference Result 42879 states and 155463 transitions. [2021-07-13 20:38:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:38:39,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-13 20:38:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:39,846 INFO L225 Difference]: With dead ends: 42879 [2021-07-13 20:38:39,846 INFO L226 Difference]: Without dead ends: 42879 [2021-07-13 20:38:39,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 882.1ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:38:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42879 states. [2021-07-13 20:38:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42879 to 17863. [2021-07-13 20:38:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.9155189788377562) internal successors, (69939), 17862 states have internal predecessors, (69939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 69939 transitions. [2021-07-13 20:38:40,575 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 69939 transitions. Word has length 28 [2021-07-13 20:38:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:40,575 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 69939 transitions. [2021-07-13 20:38:40,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 69939 transitions. [2021-07-13 20:38:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:40,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:40,606 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:40,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4031,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:40,821 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:40,821 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 79 times [2021-07-13 20:38:40,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:40,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118449810] [2021-07-13 20:38:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:40,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:40,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118449810] [2021-07-13 20:38:40,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118449810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:40,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842427328] [2021-07-13 20:38:40,853 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:40,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:40,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842427328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:40,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:40,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:38:40,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791793132] [2021-07-13 20:38:40,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:40,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:40,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:40,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:40,983 INFO L87 Difference]: Start difference. First operand 17863 states and 69939 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:42,586 INFO L93 Difference]: Finished difference Result 41907 states and 152905 transitions. [2021-07-13 20:38:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:38:42,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-13 20:38:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:42,706 INFO L225 Difference]: With dead ends: 41907 [2021-07-13 20:38:42,707 INFO L226 Difference]: Without dead ends: 41907 [2021-07-13 20:38:42,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 886.0ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:38:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41907 states. [2021-07-13 20:38:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41907 to 17837. [2021-07-13 20:38:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.912480376766091) internal successors, (69783), 17836 states have internal predecessors, (69783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 69783 transitions. [2021-07-13 20:38:43,408 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 69783 transitions. Word has length 28 [2021-07-13 20:38:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:43,408 INFO L482 AbstractCegarLoop]: Abstraction has 17837 states and 69783 transitions. [2021-07-13 20:38:43,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 69783 transitions. [2021-07-13 20:38:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:43,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:43,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:43,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-07-13 20:38:43,655 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:43,656 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-07-13 20:38:43,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:43,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337739141] [2021-07-13 20:38:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:43,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:43,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337739141] [2021-07-13 20:38:43,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337739141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:43,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849054162] [2021-07-13 20:38:43,686 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:43,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:43,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:43,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:43,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849054162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:43,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:43,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:38:43,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697636870] [2021-07-13 20:38:43,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:38:43,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:38:43,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:38:43,763 INFO L87 Difference]: Start difference. First operand 17837 states and 69783 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:44,075 INFO L93 Difference]: Finished difference Result 28682 states and 110964 transitions. [2021-07-13 20:38:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:38:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-07-13 20:38:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:44,156 INFO L225 Difference]: With dead ends: 28682 [2021-07-13 20:38:44,157 INFO L226 Difference]: Without dead ends: 28632 [2021-07-13 20:38:44,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:38:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28632 states. [2021-07-13 20:38:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28632 to 23563. [2021-07-13 20:38:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23563 states, 23562 states have (on average 3.9230965113318055) internal successors, (92436), 23562 states have internal predecessors, (92436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23563 states to 23563 states and 92436 transitions. [2021-07-13 20:38:44,800 INFO L78 Accepts]: Start accepts. Automaton has 23563 states and 92436 transitions. Word has length 28 [2021-07-13 20:38:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:44,800 INFO L482 AbstractCegarLoop]: Abstraction has 23563 states and 92436 transitions. [2021-07-13 20:38:44,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 23563 states and 92436 transitions. [2021-07-13 20:38:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:44,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:44,839 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:45,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-07-13 20:38:45,054 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-07-13 20:38:45,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:45,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45094206] [2021-07-13 20:38:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:45,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:45,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45094206] [2021-07-13 20:38:45,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45094206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:45,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474923482] [2021-07-13 20:38:45,079 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:45,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:38:45,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:45,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:38:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:45,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474923482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:45,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:45,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:38:45,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383456603] [2021-07-13 20:38:45,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:38:45,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:38:45,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:38:45,158 INFO L87 Difference]: Start difference. First operand 23563 states and 92436 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:45,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:45,453 INFO L93 Difference]: Finished difference Result 26308 states and 100773 transitions. [2021-07-13 20:38:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:38:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:38:45,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:45,526 INFO L225 Difference]: With dead ends: 26308 [2021-07-13 20:38:45,526 INFO L226 Difference]: Without dead ends: 26308 [2021-07-13 20:38:45,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26308 states. [2021-07-13 20:38:45,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26308 to 23066. [2021-07-13 20:38:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23066 states, 23065 states have (on average 3.9134619553435943) internal successors, (90264), 23065 states have internal predecessors, (90264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23066 states to 23066 states and 90264 transitions. [2021-07-13 20:38:46,019 INFO L78 Accepts]: Start accepts. Automaton has 23066 states and 90264 transitions. Word has length 28 [2021-07-13 20:38:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:46,020 INFO L482 AbstractCegarLoop]: Abstraction has 23066 states and 90264 transitions. [2021-07-13 20:38:46,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 23066 states and 90264 transitions. [2021-07-13 20:38:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:46,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:46,057 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:46,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-07-13 20:38:46,274 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-07-13 20:38:46,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:46,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358890946] [2021-07-13 20:38:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:46,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:46,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358890946] [2021-07-13 20:38:46,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358890946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:46,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324602172] [2021-07-13 20:38:46,307 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:46,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:46,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:46,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:46,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:46,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324602172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:46,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:46,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:38:46,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518219668] [2021-07-13 20:38:46,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:38:46,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:46,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:38:46,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:38:46,416 INFO L87 Difference]: Start difference. First operand 23066 states and 90264 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:47,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:47,481 INFO L93 Difference]: Finished difference Result 35513 states and 132496 transitions. [2021-07-13 20:38:47,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:38:47,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-07-13 20:38:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:47,579 INFO L225 Difference]: With dead ends: 35513 [2021-07-13 20:38:47,579 INFO L226 Difference]: Without dead ends: 35513 [2021-07-13 20:38:47,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:38:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35513 states. [2021-07-13 20:38:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35513 to 23134. [2021-07-13 20:38:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 23133 states have (on average 3.9115981498292482) internal successors, (90487), 23133 states have internal predecessors, (90487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 90487 transitions. [2021-07-13 20:38:48,230 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 90487 transitions. Word has length 28 [2021-07-13 20:38:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:48,230 INFO L482 AbstractCegarLoop]: Abstraction has 23134 states and 90487 transitions. [2021-07-13 20:38:48,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 90487 transitions. [2021-07-13 20:38:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:48,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:48,271 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:48,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-07-13 20:38:48,487 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-07-13 20:38:48,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:48,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114188950] [2021-07-13 20:38:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:48,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:48,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114188950] [2021-07-13 20:38:48,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114188950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:48,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475777827] [2021-07-13 20:38:48,521 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:48,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:38:48,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:48,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:48,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:48,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475777827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:48,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:48,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:38:48,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316313793] [2021-07-13 20:38:48,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:48,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:48,646 INFO L87 Difference]: Start difference. First operand 23134 states and 90487 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-13 20:38:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:50,425 INFO L93 Difference]: Finished difference Result 45671 states and 168413 transitions. [2021-07-13 20:38:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:38:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-07-13 20:38:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:50,588 INFO L225 Difference]: With dead ends: 45671 [2021-07-13 20:38:50,588 INFO L226 Difference]: Without dead ends: 45671 [2021-07-13 20:38:50,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 855.4ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:38:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45671 states. [2021-07-13 20:38:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45671 to 23135. [2021-07-13 20:38:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23135 states, 23134 states have (on average 3.913460707184231) internal successors, (90534), 23134 states have internal predecessors, (90534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23135 states to 23135 states and 90534 transitions. [2021-07-13 20:38:51,606 INFO L78 Accepts]: Start accepts. Automaton has 23135 states and 90534 transitions. Word has length 28 [2021-07-13 20:38:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:51,606 INFO L482 AbstractCegarLoop]: Abstraction has 23135 states and 90534 transitions. [2021-07-13 20:38:51,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-13 20:38:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 23135 states and 90534 transitions. [2021-07-13 20:38:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:51,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:51,647 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:51,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:51,864 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:51,865 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-07-13 20:38:51,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:51,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036596258] [2021-07-13 20:38:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:52,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:52,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036596258] [2021-07-13 20:38:52,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036596258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:52,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026104233] [2021-07-13 20:38:52,059 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:52,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:38:52,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:52,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:52,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026104233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:52,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:52,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:38:52,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007621178] [2021-07-13 20:38:52,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:38:52,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:52,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:38:52,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:38:52,185 INFO L87 Difference]: Start difference. First operand 23135 states and 90534 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-13 20:38:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:53,676 INFO L93 Difference]: Finished difference Result 45296 states and 167759 transitions. [2021-07-13 20:38:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:38:53,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-07-13 20:38:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:53,976 INFO L225 Difference]: With dead ends: 45296 [2021-07-13 20:38:53,976 INFO L226 Difference]: Without dead ends: 45296 [2021-07-13 20:38:53,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 863.0ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:38:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45296 states. [2021-07-13 20:38:55,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45296 to 22919. [2021-07-13 20:38:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22919 states, 22918 states have (on average 3.9066236146260582) internal successors, (89532), 22918 states have internal predecessors, (89532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22919 states to 22919 states and 89532 transitions. [2021-07-13 20:38:55,353 INFO L78 Accepts]: Start accepts. Automaton has 22919 states and 89532 transitions. Word has length 28 [2021-07-13 20:38:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:55,353 INFO L482 AbstractCegarLoop]: Abstraction has 22919 states and 89532 transitions. [2021-07-13 20:38:55,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-13 20:38:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 22919 states and 89532 transitions. [2021-07-13 20:38:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:55,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:55,431 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:55,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:55,645 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:55,645 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-07-13 20:38:55,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:55,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372828137] [2021-07-13 20:38:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:55,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:55,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372828137] [2021-07-13 20:38:55,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372828137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:55,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146738470] [2021-07-13 20:38:55,672 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:55,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:55,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:38:55,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146738470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:55,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:55,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:38:55,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773546336] [2021-07-13 20:38:55,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:38:55,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:55,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:38:55,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:38:55,748 INFO L87 Difference]: Start difference. First operand 22919 states and 89532 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:56,234 INFO L93 Difference]: Finished difference Result 35247 states and 132459 transitions. [2021-07-13 20:38:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:38:56,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:56,351 INFO L225 Difference]: With dead ends: 35247 [2021-07-13 20:38:56,352 INFO L226 Difference]: Without dead ends: 35230 [2021-07-13 20:38:56,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35230 states. [2021-07-13 20:38:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35230 to 23187. [2021-07-13 20:38:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23187 states, 23186 states have (on average 3.9111532821530233) internal successors, (90684), 23186 states have internal predecessors, (90684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23187 states to 23187 states and 90684 transitions. [2021-07-13 20:38:57,334 INFO L78 Accepts]: Start accepts. Automaton has 23187 states and 90684 transitions. Word has length 28 [2021-07-13 20:38:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:57,334 INFO L482 AbstractCegarLoop]: Abstraction has 23187 states and 90684 transitions. [2021-07-13 20:38:57,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 23187 states and 90684 transitions. [2021-07-13 20:38:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:57,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:57,382 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:57,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:57,597 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-07-13 20:38:57,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:57,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40160607] [2021-07-13 20:38:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:57,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:57,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40160607] [2021-07-13 20:38:57,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40160607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:57,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175930427] [2021-07-13 20:38:57,625 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:57,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:57,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:38:57,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:38:57,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175930427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:57,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:57,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:38:57,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471699350] [2021-07-13 20:38:57,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:38:57,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:57,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:38:57,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:38:57,699 INFO L87 Difference]: Start difference. First operand 23187 states and 90684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:58,229 INFO L93 Difference]: Finished difference Result 37405 states and 139306 transitions. [2021-07-13 20:38:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:38:58,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:38:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:58,356 INFO L225 Difference]: With dead ends: 37405 [2021-07-13 20:38:58,356 INFO L226 Difference]: Without dead ends: 37405 [2021-07-13 20:38:58,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37405 states. [2021-07-13 20:38:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37405 to 22856. [2021-07-13 20:38:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22856 states, 22855 states have (on average 3.898402975278932) internal successors, (89098), 22855 states have internal predecessors, (89098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22856 states to 22856 states and 89098 transitions. [2021-07-13 20:38:59,250 INFO L78 Accepts]: Start accepts. Automaton has 22856 states and 89098 transitions. Word has length 28 [2021-07-13 20:38:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:59,251 INFO L482 AbstractCegarLoop]: Abstraction has 22856 states and 89098 transitions. [2021-07-13 20:38:59,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 22856 states and 89098 transitions. [2021-07-13 20:38:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:38:59,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:59,295 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:38:59,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:59,511 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:59,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-07-13 20:38:59,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:59,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307206772] [2021-07-13 20:38:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:59,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:59,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307206772] [2021-07-13 20:38:59,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307206772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:59,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253945955] [2021-07-13 20:38:59,544 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:59,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:38:59,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:38:59,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:38:59,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253945955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:59,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:59,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:38:59,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159338839] [2021-07-13 20:38:59,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:38:59,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:59,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:38:59,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:38:59,628 INFO L87 Difference]: Start difference. First operand 22856 states and 89098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:00,517 INFO L93 Difference]: Finished difference Result 32629 states and 122440 transitions. [2021-07-13 20:39:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:39:00,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:39:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:00,628 INFO L225 Difference]: With dead ends: 32629 [2021-07-13 20:39:00,629 INFO L226 Difference]: Without dead ends: 32629 [2021-07-13 20:39:00,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:39:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32629 states. [2021-07-13 20:39:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32629 to 22904. [2021-07-13 20:39:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22904 states, 22903 states have (on average 3.8973060297777584) internal successors, (89260), 22903 states have internal predecessors, (89260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22904 states to 22904 states and 89260 transitions. [2021-07-13 20:39:01,558 INFO L78 Accepts]: Start accepts. Automaton has 22904 states and 89260 transitions. Word has length 28 [2021-07-13 20:39:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:01,558 INFO L482 AbstractCegarLoop]: Abstraction has 22904 states and 89260 transitions. [2021-07-13 20:39:01,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 22904 states and 89260 transitions. [2021-07-13 20:39:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:01,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:01,602 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:01,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:01,817 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-07-13 20:39:01,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:01,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534423064] [2021-07-13 20:39:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:01,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534423064] [2021-07-13 20:39:01,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534423064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898393852] [2021-07-13 20:39:01,849 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:01,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:01,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:01,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:01,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898393852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:01,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:01,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:39:01,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125336221] [2021-07-13 20:39:01,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:01,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:01,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:01,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:01,931 INFO L87 Difference]: Start difference. First operand 22904 states and 89260 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:03,031 INFO L93 Difference]: Finished difference Result 34174 states and 126879 transitions. [2021-07-13 20:39:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:39:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:39:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:03,153 INFO L225 Difference]: With dead ends: 34174 [2021-07-13 20:39:03,153 INFO L226 Difference]: Without dead ends: 34174 [2021-07-13 20:39:03,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:39:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34174 states. [2021-07-13 20:39:04,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34174 to 23462. [2021-07-13 20:39:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 3.8782234346362046) internal successors, (90987), 23461 states have internal predecessors, (90987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 90987 transitions. [2021-07-13 20:39:04,224 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 90987 transitions. Word has length 28 [2021-07-13 20:39:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:04,224 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 90987 transitions. [2021-07-13 20:39:04,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:04,224 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 90987 transitions. [2021-07-13 20:39:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:04,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:04,267 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:04,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-07-13 20:39:04,481 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-07-13 20:39:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:04,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415137367] [2021-07-13 20:39:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:04,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:04,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415137367] [2021-07-13 20:39:04,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415137367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:04,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681825843] [2021-07-13 20:39:04,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:04,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:39:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:04,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:04,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681825843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:04,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:04,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:39:04,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465372479] [2021-07-13 20:39:04,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:04,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:04,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:04,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:04,630 INFO L87 Difference]: Start difference. First operand 23462 states and 90987 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:05,704 INFO L93 Difference]: Finished difference Result 33276 states and 124519 transitions. [2021-07-13 20:39:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:39:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:39:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:05,799 INFO L225 Difference]: With dead ends: 33276 [2021-07-13 20:39:05,799 INFO L226 Difference]: Without dead ends: 33272 [2021-07-13 20:39:05,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:39:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33272 states. [2021-07-13 20:39:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33272 to 23354. [2021-07-13 20:39:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23354 states, 23353 states have (on average 3.880657731340727) internal successors, (90625), 23353 states have internal predecessors, (90625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23354 states to 23354 states and 90625 transitions. [2021-07-13 20:39:06,623 INFO L78 Accepts]: Start accepts. Automaton has 23354 states and 90625 transitions. Word has length 28 [2021-07-13 20:39:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:06,623 INFO L482 AbstractCegarLoop]: Abstraction has 23354 states and 90625 transitions. [2021-07-13 20:39:06,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 23354 states and 90625 transitions. [2021-07-13 20:39:06,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:06,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:06,666 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:06,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4042,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:06,882 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:06,882 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-07-13 20:39:06,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:06,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669068493] [2021-07-13 20:39:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:06,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:06,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669068493] [2021-07-13 20:39:06,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669068493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:06,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975864701] [2021-07-13 20:39:06,912 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:06,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:06,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:39:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:39:07,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975864701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:07,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:07,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:39:07,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099869903] [2021-07-13 20:39:07,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:39:07,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:39:07,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:39:07,004 INFO L87 Difference]: Start difference. First operand 23354 states and 90625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-13 20:39:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:07,299 INFO L93 Difference]: Finished difference Result 29681 states and 111114 transitions. [2021-07-13 20:39:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:39:07,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 28 [2021-07-13 20:39:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:07,618 INFO L225 Difference]: With dead ends: 29681 [2021-07-13 20:39:07,619 INFO L226 Difference]: Without dead ends: 29681 [2021-07-13 20:39:07,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29681 states. [2021-07-13 20:39:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29681 to 23664. [2021-07-13 20:39:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23664 states, 23663 states have (on average 3.872628153657609) internal successors, (91638), 23663 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23664 states to 23664 states and 91638 transitions. [2021-07-13 20:39:08,318 INFO L78 Accepts]: Start accepts. Automaton has 23664 states and 91638 transitions. Word has length 28 [2021-07-13 20:39:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:08,318 INFO L482 AbstractCegarLoop]: Abstraction has 23664 states and 91638 transitions. [2021-07-13 20:39:08,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-13 20:39:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 23664 states and 91638 transitions. [2021-07-13 20:39:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:08,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:08,358 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:08,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-07-13 20:39:08,574 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-07-13 20:39:08,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:08,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798835007] [2021-07-13 20:39:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:08,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:08,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798835007] [2021-07-13 20:39:08,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798835007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:08,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844159262] [2021-07-13 20:39:08,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:08,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:39:08,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844159262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:08,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:08,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:39:08,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600857138] [2021-07-13 20:39:08,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:08,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:08,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:08,698 INFO L87 Difference]: Start difference. First operand 23664 states and 91638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:39:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:09,696 INFO L93 Difference]: Finished difference Result 34438 states and 127402 transitions. [2021-07-13 20:39:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:39:09,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:39:09,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:09,808 INFO L225 Difference]: With dead ends: 34438 [2021-07-13 20:39:09,809 INFO L226 Difference]: Without dead ends: 34438 [2021-07-13 20:39:09,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 432.8ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:39:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34438 states. [2021-07-13 20:39:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34438 to 25439. [2021-07-13 20:39:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25439 states, 25438 states have (on average 3.8818696438399245) internal successors, (98747), 25438 states have internal predecessors, (98747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25439 states to 25439 states and 98747 transitions. [2021-07-13 20:39:10,760 INFO L78 Accepts]: Start accepts. Automaton has 25439 states and 98747 transitions. Word has length 28 [2021-07-13 20:39:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:10,760 INFO L482 AbstractCegarLoop]: Abstraction has 25439 states and 98747 transitions. [2021-07-13 20:39:10,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:39:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 25439 states and 98747 transitions. [2021-07-13 20:39:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:10,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:10,808 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:11,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-07-13 20:39:11,023 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-07-13 20:39:11,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:11,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658621157] [2021-07-13 20:39:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:11,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:11,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658621157] [2021-07-13 20:39:11,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658621157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:11,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006865028] [2021-07-13 20:39:11,059 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:11,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:11,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:11,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:39:11,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006865028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:11,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:11,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:39:11,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397113968] [2021-07-13 20:39:11,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:11,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:11,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:11,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:11,153 INFO L87 Difference]: Start difference. First operand 25439 states and 98747 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:39:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:12,008 INFO L93 Difference]: Finished difference Result 32691 states and 122893 transitions. [2021-07-13 20:39:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:39:12,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:39:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:12,103 INFO L225 Difference]: With dead ends: 32691 [2021-07-13 20:39:12,103 INFO L226 Difference]: Without dead ends: 32679 [2021-07-13 20:39:12,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:39:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32679 states. [2021-07-13 20:39:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32679 to 25599. [2021-07-13 20:39:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25599 states, 25598 states have (on average 3.8770607078678023) internal successors, (99245), 25598 states have internal predecessors, (99245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25599 states to 25599 states and 99245 transitions. [2021-07-13 20:39:12,898 INFO L78 Accepts]: Start accepts. Automaton has 25599 states and 99245 transitions. Word has length 28 [2021-07-13 20:39:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:12,898 INFO L482 AbstractCegarLoop]: Abstraction has 25599 states and 99245 transitions. [2021-07-13 20:39:12,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:39:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25599 states and 99245 transitions. [2021-07-13 20:39:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:12,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:12,940 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:13,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-07-13 20:39:13,156 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-07-13 20:39:13,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:13,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301904894] [2021-07-13 20:39:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:13,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:13,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301904894] [2021-07-13 20:39:13,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301904894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:13,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241782099] [2021-07-13 20:39:13,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:13,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:13,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:13,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:39:13,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:13,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241782099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:13,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:13,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:39:13,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557799241] [2021-07-13 20:39:13,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:39:13,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:39:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:39:13,483 INFO L87 Difference]: Start difference. First operand 25599 states and 99245 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:13,781 INFO L93 Difference]: Finished difference Result 30159 states and 114821 transitions. [2021-07-13 20:39:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:39:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-07-13 20:39:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:13,874 INFO L225 Difference]: With dead ends: 30159 [2021-07-13 20:39:13,874 INFO L226 Difference]: Without dead ends: 30159 [2021-07-13 20:39:13,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:13,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30159 states. [2021-07-13 20:39:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30159 to 26806. [2021-07-13 20:39:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26806 states, 26805 states have (on average 3.8731952993844434) internal successors, (103821), 26805 states have internal predecessors, (103821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26806 states to 26806 states and 103821 transitions. [2021-07-13 20:39:14,643 INFO L78 Accepts]: Start accepts. Automaton has 26806 states and 103821 transitions. Word has length 28 [2021-07-13 20:39:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:14,643 INFO L482 AbstractCegarLoop]: Abstraction has 26806 states and 103821 transitions. [2021-07-13 20:39:14,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 26806 states and 103821 transitions. [2021-07-13 20:39:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:14,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:14,795 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:15,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-07-13 20:39:15,011 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:15,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-07-13 20:39:15,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:15,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646977111] [2021-07-13 20:39:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:15,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:15,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646977111] [2021-07-13 20:39:15,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646977111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:15,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265347811] [2021-07-13 20:39:15,046 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:15,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:15,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:15,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:15,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:15,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265347811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:15,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:15,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:39:15,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929856924] [2021-07-13 20:39:15,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:15,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:15,137 INFO L87 Difference]: Start difference. First operand 26806 states and 103821 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:16,105 INFO L93 Difference]: Finished difference Result 34754 states and 129602 transitions. [2021-07-13 20:39:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:39:16,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:39:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:16,198 INFO L225 Difference]: With dead ends: 34754 [2021-07-13 20:39:16,198 INFO L226 Difference]: Without dead ends: 34754 [2021-07-13 20:39:16,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:39:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34754 states. [2021-07-13 20:39:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34754 to 28000. [2021-07-13 20:39:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28000 states, 27999 states have (on average 3.8443515839851425) internal successors, (107638), 27999 states have internal predecessors, (107638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28000 states to 28000 states and 107638 transitions. [2021-07-13 20:39:16,955 INFO L78 Accepts]: Start accepts. Automaton has 28000 states and 107638 transitions. Word has length 28 [2021-07-13 20:39:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:16,955 INFO L482 AbstractCegarLoop]: Abstraction has 28000 states and 107638 transitions. [2021-07-13 20:39:16,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 28000 states and 107638 transitions. [2021-07-13 20:39:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:17,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:17,005 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:17,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:17,220 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-07-13 20:39:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:17,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028649370] [2021-07-13 20:39:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:17,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:17,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028649370] [2021-07-13 20:39:17,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028649370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:17,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906896793] [2021-07-13 20:39:17,251 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:17,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:39:17,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:17,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:17,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906896793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:17,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:17,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:39:17,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683927060] [2021-07-13 20:39:17,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:39:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:39:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:39:17,330 INFO L87 Difference]: Start difference. First operand 28000 states and 107638 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:18,099 INFO L93 Difference]: Finished difference Result 33849 states and 127203 transitions. [2021-07-13 20:39:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:39:18,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:39:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:18,196 INFO L225 Difference]: With dead ends: 33849 [2021-07-13 20:39:18,196 INFO L226 Difference]: Without dead ends: 33841 [2021-07-13 20:39:18,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:39:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33841 states. [2021-07-13 20:39:19,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33841 to 27806. [2021-07-13 20:39:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27806 states, 27805 states have (on average 3.8502787268476895) internal successors, (107057), 27805 states have internal predecessors, (107057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27806 states to 27806 states and 107057 transitions. [2021-07-13 20:39:19,180 INFO L78 Accepts]: Start accepts. Automaton has 27806 states and 107057 transitions. Word has length 28 [2021-07-13 20:39:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:19,181 INFO L482 AbstractCegarLoop]: Abstraction has 27806 states and 107057 transitions. [2021-07-13 20:39:19,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 27806 states and 107057 transitions. [2021-07-13 20:39:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:19,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:19,231 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:19,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:19,445 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-07-13 20:39:19,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:19,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22923022] [2021-07-13 20:39:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:19,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:19,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22923022] [2021-07-13 20:39:19,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22923022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:19,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305162845] [2021-07-13 20:39:19,475 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:19,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:19,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:19,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:19,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:19,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305162845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:19,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:19,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:39:19,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667809243] [2021-07-13 20:39:19,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:39:19,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:19,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:39:19,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:39:19,567 INFO L87 Difference]: Start difference. First operand 27806 states and 107057 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:20,517 INFO L93 Difference]: Finished difference Result 35673 states and 132779 transitions. [2021-07-13 20:39:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:39:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:39:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:20,627 INFO L225 Difference]: With dead ends: 35673 [2021-07-13 20:39:20,627 INFO L226 Difference]: Without dead ends: 35673 [2021-07-13 20:39:20,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:39:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35673 states. [2021-07-13 20:39:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35673 to 28844. [2021-07-13 20:39:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28844 states, 28843 states have (on average 3.827618486287834) internal successors, (110400), 28843 states have internal predecessors, (110400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28844 states to 28844 states and 110400 transitions. [2021-07-13 20:39:21,741 INFO L78 Accepts]: Start accepts. Automaton has 28844 states and 110400 transitions. Word has length 28 [2021-07-13 20:39:21,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:21,741 INFO L482 AbstractCegarLoop]: Abstraction has 28844 states and 110400 transitions. [2021-07-13 20:39:21,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28844 states and 110400 transitions. [2021-07-13 20:39:21,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:21,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:21,801 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:22,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:22,017 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:22,017 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-07-13 20:39:22,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:22,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584307925] [2021-07-13 20:39:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:22,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:22,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584307925] [2021-07-13 20:39:22,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584307925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:22,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418504490] [2021-07-13 20:39:22,048 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:22,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418504490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:22,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:22,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:39:22,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330579157] [2021-07-13 20:39:22,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:39:22,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:22,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:39:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:39:22,135 INFO L87 Difference]: Start difference. First operand 28844 states and 110400 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:22,631 INFO L93 Difference]: Finished difference Result 35179 states and 133683 transitions. [2021-07-13 20:39:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:39:22,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:39:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:22,755 INFO L225 Difference]: With dead ends: 35179 [2021-07-13 20:39:22,755 INFO L226 Difference]: Without dead ends: 35166 [2021-07-13 20:39:22,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:39:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35166 states. [2021-07-13 20:39:23,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35166 to 33639. [2021-07-13 20:39:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33639 states, 33638 states have (on average 3.8427968369106367) internal successors, (129264), 33638 states have internal predecessors, (129264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33639 states to 33639 states and 129264 transitions. [2021-07-13 20:39:23,679 INFO L78 Accepts]: Start accepts. Automaton has 33639 states and 129264 transitions. Word has length 28 [2021-07-13 20:39:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:23,679 INFO L482 AbstractCegarLoop]: Abstraction has 33639 states and 129264 transitions. [2021-07-13 20:39:23,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 33639 states and 129264 transitions. [2021-07-13 20:39:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:23,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:23,743 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:23,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4050,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:23,958 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:23,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-07-13 20:39:23,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:23,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038770241] [2021-07-13 20:39:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:23,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:23,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038770241] [2021-07-13 20:39:23,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038770241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:23,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343507875] [2021-07-13 20:39:23,988 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:24,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:24,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:24,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343507875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:24,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:24,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:39:24,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720640248] [2021-07-13 20:39:24,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:39:24,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:24,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:39:24,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:39:24,053 INFO L87 Difference]: Start difference. First operand 33639 states and 129264 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:24,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:24,623 INFO L93 Difference]: Finished difference Result 36796 states and 139166 transitions. [2021-07-13 20:39:24,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:39:24,624 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:39:24,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:24,747 INFO L225 Difference]: With dead ends: 36796 [2021-07-13 20:39:24,747 INFO L226 Difference]: Without dead ends: 36796 [2021-07-13 20:39:24,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:39:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36796 states. [2021-07-13 20:39:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36796 to 33316. [2021-07-13 20:39:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33316 states, 33315 states have (on average 3.839021461803992) internal successors, (127897), 33315 states have internal predecessors, (127897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33316 states to 33316 states and 127897 transitions. [2021-07-13 20:39:25,807 INFO L78 Accepts]: Start accepts. Automaton has 33316 states and 127897 transitions. Word has length 28 [2021-07-13 20:39:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:25,807 INFO L482 AbstractCegarLoop]: Abstraction has 33316 states and 127897 transitions. [2021-07-13 20:39:25,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33316 states and 127897 transitions. [2021-07-13 20:39:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:25,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:25,868 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:26,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-07-13 20:39:26,084 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:26,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-07-13 20:39:26,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:26,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280976914] [2021-07-13 20:39:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:26,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:26,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280976914] [2021-07-13 20:39:26,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280976914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:26,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730196727] [2021-07-13 20:39:26,114 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:26,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:39:26,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:26,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730196727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:26,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:26,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:39:26,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97939558] [2021-07-13 20:39:26,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:39:26,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:39:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:39:26,196 INFO L87 Difference]: Start difference. First operand 33316 states and 127897 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:26,986 INFO L93 Difference]: Finished difference Result 39856 states and 149676 transitions. [2021-07-13 20:39:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:39:26,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:39:26,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:27,103 INFO L225 Difference]: With dead ends: 39856 [2021-07-13 20:39:27,103 INFO L226 Difference]: Without dead ends: 39848 [2021-07-13 20:39:27,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:39:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2021-07-13 20:39:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 33282. [2021-07-13 20:39:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33282 states, 33281 states have (on average 3.839427901805835) internal successors, (127780), 33281 states have internal predecessors, (127780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33282 states to 33282 states and 127780 transitions. [2021-07-13 20:39:28,203 INFO L78 Accepts]: Start accepts. Automaton has 33282 states and 127780 transitions. Word has length 28 [2021-07-13 20:39:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:28,203 INFO L482 AbstractCegarLoop]: Abstraction has 33282 states and 127780 transitions. [2021-07-13 20:39:28,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:28,203 INFO L276 IsEmpty]: Start isEmpty. Operand 33282 states and 127780 transitions. [2021-07-13 20:39:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:28,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:28,261 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:28,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4052,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:28,477 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:28,478 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-07-13 20:39:28,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:28,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25693004] [2021-07-13 20:39:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:28,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:28,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25693004] [2021-07-13 20:39:28,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25693004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:28,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031794692] [2021-07-13 20:39:28,508 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:28,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:28,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:28,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:28,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:28,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031794692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:28,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:28,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:39:28,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277971195] [2021-07-13 20:39:28,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:39:28,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:28,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:39:28,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:39:28,582 INFO L87 Difference]: Start difference. First operand 33282 states and 127780 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:29,040 INFO L93 Difference]: Finished difference Result 36198 states and 137505 transitions. [2021-07-13 20:39:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:39:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:39:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:29,386 INFO L225 Difference]: With dead ends: 36198 [2021-07-13 20:39:29,386 INFO L226 Difference]: Without dead ends: 36198 [2021-07-13 20:39:29,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:39:29,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36198 states. [2021-07-13 20:39:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36198 to 33814. [2021-07-13 20:39:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33814 states, 33813 states have (on average 3.837695560878952) internal successors, (129764), 33813 states have internal predecessors, (129764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33814 states to 33814 states and 129764 transitions. [2021-07-13 20:39:30,162 INFO L78 Accepts]: Start accepts. Automaton has 33814 states and 129764 transitions. Word has length 28 [2021-07-13 20:39:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:30,163 INFO L482 AbstractCegarLoop]: Abstraction has 33814 states and 129764 transitions. [2021-07-13 20:39:30,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 33814 states and 129764 transitions. [2021-07-13 20:39:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:30,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:30,221 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:30,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-07-13 20:39:30,436 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-07-13 20:39:30,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:30,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033676385] [2021-07-13 20:39:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:30,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:30,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033676385] [2021-07-13 20:39:30,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033676385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:30,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452425895] [2021-07-13 20:39:30,466 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:30,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:30,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:30,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:30,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:30,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452425895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:30,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:30,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:39:30,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337971149] [2021-07-13 20:39:30,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:39:30,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:39:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:39:30,544 INFO L87 Difference]: Start difference. First operand 33814 states and 129764 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:31,354 INFO L93 Difference]: Finished difference Result 40833 states and 153241 transitions. [2021-07-13 20:39:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:39:31,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-07-13 20:39:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:31,475 INFO L225 Difference]: With dead ends: 40833 [2021-07-13 20:39:31,476 INFO L226 Difference]: Without dead ends: 40809 [2021-07-13 20:39:31,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:39:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40809 states. [2021-07-13 20:39:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40809 to 33986. [2021-07-13 20:39:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33986 states, 33985 states have (on average 3.8339855818743565) internal successors, (130298), 33985 states have internal predecessors, (130298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33986 states to 33986 states and 130298 transitions. [2021-07-13 20:39:32,653 INFO L78 Accepts]: Start accepts. Automaton has 33986 states and 130298 transitions. Word has length 28 [2021-07-13 20:39:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:32,653 INFO L482 AbstractCegarLoop]: Abstraction has 33986 states and 130298 transitions. [2021-07-13 20:39:32,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33986 states and 130298 transitions. [2021-07-13 20:39:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:32,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:32,712 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:32,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-07-13 20:39:32,926 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:32,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:32,926 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-07-13 20:39:32,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:32,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121887369] [2021-07-13 20:39:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:32,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:32,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121887369] [2021-07-13 20:39:32,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121887369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:32,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106685732] [2021-07-13 20:39:32,964 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:32,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:32,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:32,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:33,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106685732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:33,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:33,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 20:39:33,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53046919] [2021-07-13 20:39:33,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:39:33,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:39:33,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:39:33,047 INFO L87 Difference]: Start difference. First operand 33986 states and 130298 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:33,723 INFO L93 Difference]: Finished difference Result 36618 states and 138998 transitions. [2021-07-13 20:39:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:39:33,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-07-13 20:39:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:33,832 INFO L225 Difference]: With dead ends: 36618 [2021-07-13 20:39:33,832 INFO L226 Difference]: Without dead ends: 36618 [2021-07-13 20:39:33,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:39:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36618 states. [2021-07-13 20:39:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36618 to 33912. [2021-07-13 20:39:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33912 states, 33911 states have (on average 3.8348028663265605) internal successors, (130042), 33911 states have internal predecessors, (130042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33912 states to 33912 states and 130042 transitions. [2021-07-13 20:39:35,025 INFO L78 Accepts]: Start accepts. Automaton has 33912 states and 130042 transitions. Word has length 28 [2021-07-13 20:39:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:35,025 INFO L482 AbstractCegarLoop]: Abstraction has 33912 states and 130042 transitions. [2021-07-13 20:39:35,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33912 states and 130042 transitions. [2021-07-13 20:39:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:35,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:35,088 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:35,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-07-13 20:39:35,304 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:35,304 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-07-13 20:39:35,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:35,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236878136] [2021-07-13 20:39:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:35,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:35,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236878136] [2021-07-13 20:39:35,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236878136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:35,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367297635] [2021-07-13 20:39:35,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:35,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:35,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:35,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367297635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:35,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:35,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:39:35,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004106529] [2021-07-13 20:39:35,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:35,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:35,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:35,412 INFO L87 Difference]: Start difference. First operand 33912 states and 130042 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:36,215 INFO L93 Difference]: Finished difference Result 40756 states and 152982 transitions. [2021-07-13 20:39:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:39:36,216 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-13 20:39:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:36,335 INFO L225 Difference]: With dead ends: 40756 [2021-07-13 20:39:36,336 INFO L226 Difference]: Without dead ends: 40716 [2021-07-13 20:39:36,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:39:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40716 states. [2021-07-13 20:39:37,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40716 to 34086. [2021-07-13 20:39:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34086 states, 34085 states have (on average 3.8309813701041513) internal successors, (130579), 34085 states have internal predecessors, (130579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34086 states to 34086 states and 130579 transitions. [2021-07-13 20:39:37,256 INFO L78 Accepts]: Start accepts. Automaton has 34086 states and 130579 transitions. Word has length 28 [2021-07-13 20:39:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:37,256 INFO L482 AbstractCegarLoop]: Abstraction has 34086 states and 130579 transitions. [2021-07-13 20:39:37,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 34086 states and 130579 transitions. [2021-07-13 20:39:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:37,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:37,564 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:37,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-07-13 20:39:37,780 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:37,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:37,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-07-13 20:39:37,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:37,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132710012] [2021-07-13 20:39:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:37,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:37,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132710012] [2021-07-13 20:39:37,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132710012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:37,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950307041] [2021-07-13 20:39:37,822 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:37,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:37,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:37,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:37,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:37,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950307041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:37,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:37,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:39:37,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180959324] [2021-07-13 20:39:37,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:37,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:37,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:37,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:37,986 INFO L87 Difference]: Start difference. First operand 34086 states and 130579 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:39,075 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-13 20:39:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:39,377 INFO L93 Difference]: Finished difference Result 76027 states and 281494 transitions. [2021-07-13 20:39:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:39:39,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-13 20:39:39,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:39,634 INFO L225 Difference]: With dead ends: 76027 [2021-07-13 20:39:39,635 INFO L226 Difference]: Without dead ends: 76027 [2021-07-13 20:39:39,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 755.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:39:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76027 states. [2021-07-13 20:39:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76027 to 43183. [2021-07-13 20:39:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43183 states, 43182 states have (on average 3.906581445972859) internal successors, (168694), 43182 states have internal predecessors, (168694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43183 states to 43183 states and 168694 transitions. [2021-07-13 20:39:41,670 INFO L78 Accepts]: Start accepts. Automaton has 43183 states and 168694 transitions. Word has length 28 [2021-07-13 20:39:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:41,670 INFO L482 AbstractCegarLoop]: Abstraction has 43183 states and 168694 transitions. [2021-07-13 20:39:41,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 43183 states and 168694 transitions. [2021-07-13 20:39:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:41,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:41,746 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:41,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-07-13 20:39:41,961 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:41,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-07-13 20:39:41,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:41,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587794485] [2021-07-13 20:39:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:41,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:41,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587794485] [2021-07-13 20:39:41,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587794485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:41,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766827602] [2021-07-13 20:39:41,989 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:42,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:39:42,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:42,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:42,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:42,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766827602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:42,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:42,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:39:42,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136497740] [2021-07-13 20:39:42,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:42,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:42,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:42,093 INFO L87 Difference]: Start difference. First operand 43183 states and 168694 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:43,924 INFO L93 Difference]: Finished difference Result 75388 states and 279801 transitions. [2021-07-13 20:39:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:39:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-13 20:39:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:44,365 INFO L225 Difference]: With dead ends: 75388 [2021-07-13 20:39:44,365 INFO L226 Difference]: Without dead ends: 75388 [2021-07-13 20:39:44,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 623.7ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:39:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75388 states. [2021-07-13 20:39:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75388 to 43180. [2021-07-13 20:39:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43180 states, 43179 states have (on average 3.906528636605757) internal successors, (168680), 43179 states have internal predecessors, (168680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43180 states to 43180 states and 168680 transitions. [2021-07-13 20:39:46,496 INFO L78 Accepts]: Start accepts. Automaton has 43180 states and 168680 transitions. Word has length 28 [2021-07-13 20:39:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:46,496 INFO L482 AbstractCegarLoop]: Abstraction has 43180 states and 168680 transitions. [2021-07-13 20:39:46,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 43180 states and 168680 transitions. [2021-07-13 20:39:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:46,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:46,587 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:46,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:46,801 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-07-13 20:39:46,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:46,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424941289] [2021-07-13 20:39:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:46,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:46,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424941289] [2021-07-13 20:39:46,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424941289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:46,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073115071] [2021-07-13 20:39:46,830 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:46,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:46,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073115071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:46,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:46,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:39:46,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229274121] [2021-07-13 20:39:46,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:46,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:46,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:46,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:46,927 INFO L87 Difference]: Start difference. First operand 43180 states and 168680 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:48,416 INFO L93 Difference]: Finished difference Result 69979 states and 261702 transitions. [2021-07-13 20:39:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:39:48,417 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:39:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:49,021 INFO L225 Difference]: With dead ends: 69979 [2021-07-13 20:39:49,021 INFO L226 Difference]: Without dead ends: 69979 [2021-07-13 20:39:49,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:39:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69979 states. [2021-07-13 20:39:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69979 to 43204. [2021-07-13 20:39:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9067657338610746) internal successors, (168784), 43203 states have internal predecessors, (168784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168784 transitions. [2021-07-13 20:39:51,203 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168784 transitions. Word has length 28 [2021-07-13 20:39:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:51,203 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168784 transitions. [2021-07-13 20:39:51,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168784 transitions. [2021-07-13 20:39:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:51,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:51,303 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:51,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:51,517 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-07-13 20:39:51,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:51,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190491436] [2021-07-13 20:39:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:51,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:51,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190491436] [2021-07-13 20:39:51,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190491436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:51,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072441298] [2021-07-13 20:39:51,545 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:51,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:39:51,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:51,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072441298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:51,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:51,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:39:51,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037924888] [2021-07-13 20:39:51,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:51,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:51,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:51,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:51,642 INFO L87 Difference]: Start difference. First operand 43204 states and 168784 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:52,964 INFO L93 Difference]: Finished difference Result 69094 states and 259411 transitions. [2021-07-13 20:39:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:39:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:39:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:53,243 INFO L225 Difference]: With dead ends: 69094 [2021-07-13 20:39:53,243 INFO L226 Difference]: Without dead ends: 69086 [2021-07-13 20:39:53,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:39:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69086 states. [2021-07-13 20:39:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69086 to 43204. [2021-07-13 20:39:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9066268546165777) internal successors, (168778), 43203 states have internal predecessors, (168778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168778 transitions. [2021-07-13 20:39:55,415 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168778 transitions. Word has length 28 [2021-07-13 20:39:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:55,415 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168778 transitions. [2021-07-13 20:39:55,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168778 transitions. [2021-07-13 20:39:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:55,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:55,505 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:39:55,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:55,709 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:55,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-07-13 20:39:55,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:55,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186056710] [2021-07-13 20:39:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:55,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:55,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186056710] [2021-07-13 20:39:55,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186056710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:55,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950035620] [2021-07-13 20:39:55,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:55,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:55,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:55,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:55,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:55,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950035620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:55,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:55,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:39:55,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379799281] [2021-07-13 20:39:55,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:55,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:55,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:55,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:55,869 INFO L87 Difference]: Start difference. First operand 43204 states and 168778 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:57,702 INFO L93 Difference]: Finished difference Result 68768 states and 258526 transitions. [2021-07-13 20:39:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:39:57,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:39:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:57,987 INFO L225 Difference]: With dead ends: 68768 [2021-07-13 20:39:57,987 INFO L226 Difference]: Without dead ends: 68768 [2021-07-13 20:39:57,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:39:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68768 states. [2021-07-13 20:39:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68768 to 43212. [2021-07-13 20:39:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.9066904260489226) internal successors, (168812), 43211 states have internal predecessors, (168812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168812 transitions. [2021-07-13 20:40:00,237 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168812 transitions. Word has length 28 [2021-07-13 20:40:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:00,237 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168812 transitions. [2021-07-13 20:40:00,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168812 transitions. [2021-07-13 20:40:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:00,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:00,318 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:00,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-07-13 20:40:00,533 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:00,534 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-07-13 20:40:00,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:00,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318450628] [2021-07-13 20:40:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:00,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:00,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318450628] [2021-07-13 20:40:00,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318450628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:00,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832295452] [2021-07-13 20:40:00,562 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:00,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:00,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:00,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832295452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:00,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:00,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:40:00,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516992335] [2021-07-13 20:40:00,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:00,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:00,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:00,665 INFO L87 Difference]: Start difference. First operand 43212 states and 168812 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:02,075 INFO L93 Difference]: Finished difference Result 68557 states and 258000 transitions. [2021-07-13 20:40:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:40:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:02,344 INFO L225 Difference]: With dead ends: 68557 [2021-07-13 20:40:02,344 INFO L226 Difference]: Without dead ends: 68549 [2021-07-13 20:40:02,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:40:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68549 states. [2021-07-13 20:40:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68549 to 43212. [2021-07-13 20:40:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.906644141538034) internal successors, (168810), 43211 states have internal predecessors, (168810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168810 transitions. [2021-07-13 20:40:04,511 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168810 transitions. Word has length 28 [2021-07-13 20:40:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:04,512 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168810 transitions. [2021-07-13 20:40:04,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168810 transitions. [2021-07-13 20:40:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:04,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:04,596 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:04,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4062,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:04,809 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:04,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:04,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-07-13 20:40:04,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:04,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036243159] [2021-07-13 20:40:04,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:04,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:04,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036243159] [2021-07-13 20:40:04,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036243159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:04,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746605228] [2021-07-13 20:40:04,841 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:04,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:04,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:04,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:04,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746605228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:04,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:04,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:40:04,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336771705] [2021-07-13 20:40:04,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:04,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:04,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:04,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:04,944 INFO L87 Difference]: Start difference. First operand 43212 states and 168810 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:06,638 INFO L93 Difference]: Finished difference Result 67982 states and 254698 transitions. [2021-07-13 20:40:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:40:06,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:40:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:06,907 INFO L225 Difference]: With dead ends: 67982 [2021-07-13 20:40:06,907 INFO L226 Difference]: Without dead ends: 67982 [2021-07-13 20:40:06,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:40:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67982 states. [2021-07-13 20:40:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67982 to 46442. [2021-07-13 20:40:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46442 states, 46441 states have (on average 3.9102086518378156) internal successors, (181594), 46441 states have internal predecessors, (181594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46442 states to 46442 states and 181594 transitions. [2021-07-13 20:40:09,365 INFO L78 Accepts]: Start accepts. Automaton has 46442 states and 181594 transitions. Word has length 28 [2021-07-13 20:40:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:09,365 INFO L482 AbstractCegarLoop]: Abstraction has 46442 states and 181594 transitions. [2021-07-13 20:40:09,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 46442 states and 181594 transitions. [2021-07-13 20:40:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:09,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:09,456 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:09,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-07-13 20:40:09,669 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:09,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-07-13 20:40:09,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:09,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366100581] [2021-07-13 20:40:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:09,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:09,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366100581] [2021-07-13 20:40:09,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366100581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:09,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650913688] [2021-07-13 20:40:09,701 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:09,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:40:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:09,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:09,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:09,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650913688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:09,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:09,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:40:09,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950944938] [2021-07-13 20:40:09,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:09,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:09,806 INFO L87 Difference]: Start difference. First operand 46442 states and 181594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:11,064 INFO L93 Difference]: Finished difference Result 67509 states and 253442 transitions. [2021-07-13 20:40:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:40:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:40:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:11,314 INFO L225 Difference]: With dead ends: 67509 [2021-07-13 20:40:11,315 INFO L226 Difference]: Without dead ends: 67501 [2021-07-13 20:40:11,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:40:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67501 states. [2021-07-13 20:40:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67501 to 46136. [2021-07-13 20:40:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46136 states, 46135 states have (on average 3.9156172103608973) internal successors, (180647), 46135 states have internal predecessors, (180647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46136 states to 46136 states and 180647 transitions. [2021-07-13 20:40:13,519 INFO L78 Accepts]: Start accepts. Automaton has 46136 states and 180647 transitions. Word has length 28 [2021-07-13 20:40:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:13,519 INFO L482 AbstractCegarLoop]: Abstraction has 46136 states and 180647 transitions. [2021-07-13 20:40:13,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:13,519 INFO L276 IsEmpty]: Start isEmpty. Operand 46136 states and 180647 transitions. [2021-07-13 20:40:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:13,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:13,613 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:13,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-07-13 20:40:13,834 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:13,834 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-07-13 20:40:13,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:13,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104994211] [2021-07-13 20:40:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:13,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:13,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104994211] [2021-07-13 20:40:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104994211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:13,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805988464] [2021-07-13 20:40:13,864 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:13,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:13,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:13,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:13,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:13,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805988464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:13,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:13,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:40:13,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378398430] [2021-07-13 20:40:13,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:13,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:13,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:13,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:13,957 INFO L87 Difference]: Start difference. First operand 46136 states and 180647 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:15,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:15,564 INFO L93 Difference]: Finished difference Result 65985 states and 249225 transitions. [2021-07-13 20:40:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:40:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-13 20:40:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:15,893 INFO L225 Difference]: With dead ends: 65985 [2021-07-13 20:40:15,893 INFO L226 Difference]: Without dead ends: 65961 [2021-07-13 20:40:15,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 377.7ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:40:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65961 states. [2021-07-13 20:40:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65961 to 46032. [2021-07-13 20:40:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46032 states, 46031 states have (on average 3.915600356281636) internal successors, (180239), 46031 states have internal predecessors, (180239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46032 states to 46032 states and 180239 transitions. [2021-07-13 20:40:18,104 INFO L78 Accepts]: Start accepts. Automaton has 46032 states and 180239 transitions. Word has length 28 [2021-07-13 20:40:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:18,104 INFO L482 AbstractCegarLoop]: Abstraction has 46032 states and 180239 transitions. [2021-07-13 20:40:18,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 46032 states and 180239 transitions. [2021-07-13 20:40:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:18,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:18,258 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:18,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4065,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:18,473 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-07-13 20:40:18,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:18,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687200804] [2021-07-13 20:40:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:18,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:18,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687200804] [2021-07-13 20:40:18,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687200804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:18,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945640260] [2021-07-13 20:40:18,533 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:18,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:40:18,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:18,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:18,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:18,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945640260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:18,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:18,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:40:18,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857298638] [2021-07-13 20:40:18,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:18,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:18,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:18,672 INFO L87 Difference]: Start difference. First operand 46032 states and 180239 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:20,245 INFO L93 Difference]: Finished difference Result 67202 states and 252555 transitions. [2021-07-13 20:40:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:40:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:20,514 INFO L225 Difference]: With dead ends: 67202 [2021-07-13 20:40:20,514 INFO L226 Difference]: Without dead ends: 67202 [2021-07-13 20:40:20,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 907.0ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:40:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67202 states. [2021-07-13 20:40:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67202 to 46128. [2021-07-13 20:40:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46128 states, 46127 states have (on average 3.9142584603377633) internal successors, (180553), 46127 states have internal predecessors, (180553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46128 states to 46128 states and 180553 transitions. [2021-07-13 20:40:22,556 INFO L78 Accepts]: Start accepts. Automaton has 46128 states and 180553 transitions. Word has length 28 [2021-07-13 20:40:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:22,556 INFO L482 AbstractCegarLoop]: Abstraction has 46128 states and 180553 transitions. [2021-07-13 20:40:22,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 46128 states and 180553 transitions. [2021-07-13 20:40:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:22,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:22,651 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:22,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-07-13 20:40:22,868 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:22,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-07-13 20:40:22,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:22,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654538027] [2021-07-13 20:40:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:22,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:22,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654538027] [2021-07-13 20:40:22,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654538027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:22,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629597713] [2021-07-13 20:40:22,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:22,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:40:22,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:22,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:23,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629597713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:23,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:23,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:40:23,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122234083] [2021-07-13 20:40:23,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:23,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:23,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:23,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:23,043 INFO L87 Difference]: Start difference. First operand 46128 states and 180553 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:23,581 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:40:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:24,893 INFO L93 Difference]: Finished difference Result 66883 states and 251651 transitions. [2021-07-13 20:40:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:40:24,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:24,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:25,140 INFO L225 Difference]: With dead ends: 66883 [2021-07-13 20:40:25,140 INFO L226 Difference]: Without dead ends: 66875 [2021-07-13 20:40:25,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 865.5ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:40:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66875 states. [2021-07-13 20:40:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66875 to 46060. [2021-07-13 20:40:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46060 states, 46059 states have (on average 3.9154345513363293) internal successors, (180341), 46059 states have internal predecessors, (180341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46060 states to 46060 states and 180341 transitions. [2021-07-13 20:40:27,381 INFO L78 Accepts]: Start accepts. Automaton has 46060 states and 180341 transitions. Word has length 28 [2021-07-13 20:40:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:27,381 INFO L482 AbstractCegarLoop]: Abstraction has 46060 states and 180341 transitions. [2021-07-13 20:40:27,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 46060 states and 180341 transitions. [2021-07-13 20:40:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:27,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:27,497 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:27,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-07-13 20:40:27,715 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:27,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-07-13 20:40:27,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:27,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397998017] [2021-07-13 20:40:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:27,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:27,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397998017] [2021-07-13 20:40:27,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397998017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:27,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566500221] [2021-07-13 20:40:27,747 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:27,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566500221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:27,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:27,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:40:27,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109851731] [2021-07-13 20:40:27,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:40:27,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:27,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:40:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:40:27,876 INFO L87 Difference]: Start difference. First operand 46060 states and 180341 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:29,093 INFO L93 Difference]: Finished difference Result 65614 states and 248140 transitions. [2021-07-13 20:40:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:40:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:29,340 INFO L225 Difference]: With dead ends: 65614 [2021-07-13 20:40:29,340 INFO L226 Difference]: Without dead ends: 65590 [2021-07-13 20:40:29,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:40:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65590 states. [2021-07-13 20:40:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65590 to 46036. [2021-07-13 20:40:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46036 states, 46035 states have (on average 3.915564244596503) internal successors, (180253), 46035 states have internal predecessors, (180253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46036 states to 46036 states and 180253 transitions. [2021-07-13 20:40:31,593 INFO L78 Accepts]: Start accepts. Automaton has 46036 states and 180253 transitions. Word has length 28 [2021-07-13 20:40:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:31,593 INFO L482 AbstractCegarLoop]: Abstraction has 46036 states and 180253 transitions. [2021-07-13 20:40:31,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 46036 states and 180253 transitions. [2021-07-13 20:40:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:31,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:31,692 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:31,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-07-13 20:40:31,908 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:31,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-07-13 20:40:31,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:31,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35283954] [2021-07-13 20:40:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:31,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:31,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35283954] [2021-07-13 20:40:31,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35283954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:31,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772688856] [2021-07-13 20:40:31,944 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:31,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:31,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:32,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772688856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:32,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:32,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:40:32,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441305143] [2021-07-13 20:40:32,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:32,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:32,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:32,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:32,033 INFO L87 Difference]: Start difference. First operand 46036 states and 180253 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:34,067 INFO L93 Difference]: Finished difference Result 68913 states and 257576 transitions. [2021-07-13 20:40:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:40:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:34,317 INFO L225 Difference]: With dead ends: 68913 [2021-07-13 20:40:34,317 INFO L226 Difference]: Without dead ends: 68913 [2021-07-13 20:40:34,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 978.4ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:40:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68913 states. [2021-07-13 20:40:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68913 to 50828. [2021-07-13 20:40:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50828 states, 50827 states have (on average 3.8652881342593504) internal successors, (196461), 50827 states have internal predecessors, (196461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 196461 transitions. [2021-07-13 20:40:36,610 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 196461 transitions. Word has length 28 [2021-07-13 20:40:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:36,611 INFO L482 AbstractCegarLoop]: Abstraction has 50828 states and 196461 transitions. [2021-07-13 20:40:36,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 196461 transitions. [2021-07-13 20:40:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:36,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:36,713 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:36,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:36,930 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:36,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-07-13 20:40:36,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:36,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417035541] [2021-07-13 20:40:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:36,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:36,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417035541] [2021-07-13 20:40:36,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417035541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:36,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37409779] [2021-07-13 20:40:36,966 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:36,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:40:36,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:36,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:36,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:37,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37409779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:37,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:37,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:40:37,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369752050] [2021-07-13 20:40:37,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:37,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:37,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:37,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:37,060 INFO L87 Difference]: Start difference. First operand 50828 states and 196461 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:37,530 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:40:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:38,923 INFO L93 Difference]: Finished difference Result 68143 states and 255462 transitions. [2021-07-13 20:40:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:40:38,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:39,194 INFO L225 Difference]: With dead ends: 68143 [2021-07-13 20:40:39,194 INFO L226 Difference]: Without dead ends: 68135 [2021-07-13 20:40:39,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 979.9ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:40:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68135 states. [2021-07-13 20:40:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68135 to 49664. [2021-07-13 20:40:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49664 states, 49663 states have (on average 3.8827900046312145) internal successors, (192831), 49663 states have internal predecessors, (192831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49664 states to 49664 states and 192831 transitions. [2021-07-13 20:40:41,563 INFO L78 Accepts]: Start accepts. Automaton has 49664 states and 192831 transitions. Word has length 28 [2021-07-13 20:40:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:41,563 INFO L482 AbstractCegarLoop]: Abstraction has 49664 states and 192831 transitions. [2021-07-13 20:40:41,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 49664 states and 192831 transitions. [2021-07-13 20:40:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:41,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:41,666 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:41,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-07-13 20:40:41,881 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:41,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:41,881 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-07-13 20:40:41,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:41,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715494669] [2021-07-13 20:40:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:41,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:41,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715494669] [2021-07-13 20:40:41,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715494669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:41,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268928337] [2021-07-13 20:40:41,917 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:41,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:41,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:42,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268928337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:42,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:42,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:40:42,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559626034] [2021-07-13 20:40:42,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:42,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:42,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:42,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:42,009 INFO L87 Difference]: Start difference. First operand 49664 states and 192831 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:43,713 INFO L93 Difference]: Finished difference Result 66443 states and 250710 transitions. [2021-07-13 20:40:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:40:43,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:44,052 INFO L225 Difference]: With dead ends: 66443 [2021-07-13 20:40:44,052 INFO L226 Difference]: Without dead ends: 66419 [2021-07-13 20:40:44,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 803.5ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:40:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66419 states. [2021-07-13 20:40:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66419 to 49644. [2021-07-13 20:40:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49644 states, 49643 states have (on average 3.8810507020123683) internal successors, (192667), 49643 states have internal predecessors, (192667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49644 states to 49644 states and 192667 transitions. [2021-07-13 20:40:46,125 INFO L78 Accepts]: Start accepts. Automaton has 49644 states and 192667 transitions. Word has length 28 [2021-07-13 20:40:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:46,125 INFO L482 AbstractCegarLoop]: Abstraction has 49644 states and 192667 transitions. [2021-07-13 20:40:46,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 49644 states and 192667 transitions. [2021-07-13 20:40:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:46,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:46,226 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:46,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:46,441 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-07-13 20:40:46,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:46,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670600610] [2021-07-13 20:40:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:46,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:46,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670600610] [2021-07-13 20:40:46,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670600610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:46,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617778017] [2021-07-13 20:40:46,477 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:46,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:40:46,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:46,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:46,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:46,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617778017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:46,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:46,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:40:46,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034483836] [2021-07-13 20:40:46,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:46,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:46,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:46,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:46,563 INFO L87 Difference]: Start difference. First operand 49644 states and 192667 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:47,917 INFO L93 Difference]: Finished difference Result 67813 states and 254591 transitions. [2021-07-13 20:40:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:40:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:48,189 INFO L225 Difference]: With dead ends: 67813 [2021-07-13 20:40:48,189 INFO L226 Difference]: Without dead ends: 67773 [2021-07-13 20:40:48,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:40:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67773 states. [2021-07-13 20:40:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67773 to 49798. [2021-07-13 20:40:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49798 states, 49797 states have (on average 3.880394401269153) internal successors, (193232), 49797 states have internal predecessors, (193232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49798 states to 49798 states and 193232 transitions. [2021-07-13 20:40:50,381 INFO L78 Accepts]: Start accepts. Automaton has 49798 states and 193232 transitions. Word has length 28 [2021-07-13 20:40:50,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:50,381 INFO L482 AbstractCegarLoop]: Abstraction has 49798 states and 193232 transitions. [2021-07-13 20:40:50,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:50,381 INFO L276 IsEmpty]: Start isEmpty. Operand 49798 states and 193232 transitions. [2021-07-13 20:40:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:50,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:50,483 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:50,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-07-13 20:40:50,700 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:50,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-07-13 20:40:50,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:50,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815548829] [2021-07-13 20:40:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:50,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:50,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815548829] [2021-07-13 20:40:50,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815548829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:50,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357426603] [2021-07-13 20:40:50,740 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:50,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:40:50,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:50,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:51,113 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-13 20:40:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:51,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357426603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:51,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:51,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:40:51,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217965669] [2021-07-13 20:40:51,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:40:51,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:40:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:40:51,181 INFO L87 Difference]: Start difference. First operand 49798 states and 193232 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:52,923 INFO L93 Difference]: Finished difference Result 66932 states and 251929 transitions. [2021-07-13 20:40:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:40:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:53,176 INFO L225 Difference]: With dead ends: 66932 [2021-07-13 20:40:53,177 INFO L226 Difference]: Without dead ends: 66932 [2021-07-13 20:40:53,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 886.4ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:40:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66932 states. [2021-07-13 20:40:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66932 to 50703. [2021-07-13 20:40:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50703 states, 50702 states have (on average 3.871701313557651) internal successors, (196303), 50702 states have internal predecessors, (196303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50703 states to 50703 states and 196303 transitions. [2021-07-13 20:40:55,144 INFO L78 Accepts]: Start accepts. Automaton has 50703 states and 196303 transitions. Word has length 28 [2021-07-13 20:40:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:55,144 INFO L482 AbstractCegarLoop]: Abstraction has 50703 states and 196303 transitions. [2021-07-13 20:40:55,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 50703 states and 196303 transitions. [2021-07-13 20:40:55,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:55,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:55,233 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:40:55,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:55,448 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:55,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-07-13 20:40:55,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:55,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871935808] [2021-07-13 20:40:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:55,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:55,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871935808] [2021-07-13 20:40:55,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871935808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:55,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091764673] [2021-07-13 20:40:55,482 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:55,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:55,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091764673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:55,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:55,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:40:55,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089449487] [2021-07-13 20:40:55,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:40:55,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:55,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:40:55,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:40:55,586 INFO L87 Difference]: Start difference. First operand 50703 states and 196303 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:57,236 INFO L93 Difference]: Finished difference Result 66428 states and 250518 transitions. [2021-07-13 20:40:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:40:57,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:40:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:57,510 INFO L225 Difference]: With dead ends: 66428 [2021-07-13 20:40:57,510 INFO L226 Difference]: Without dead ends: 66420 [2021-07-13 20:40:57,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 593.4ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:40:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66420 states. [2021-07-13 20:40:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66420 to 50627. [2021-07-13 20:40:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.8728518942835697) internal successors, (196067), 50626 states have internal predecessors, (196067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 196067 transitions. [2021-07-13 20:40:59,741 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 196067 transitions. Word has length 28 [2021-07-13 20:40:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:59,741 INFO L482 AbstractCegarLoop]: Abstraction has 50627 states and 196067 transitions. [2021-07-13 20:40:59,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 196067 transitions. [2021-07-13 20:40:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:59,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:59,836 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:00,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-07-13 20:41:00,049 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-07-13 20:41:00,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:00,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85381217] [2021-07-13 20:41:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:00,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:00,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85381217] [2021-07-13 20:41:00,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85381217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:00,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885921986] [2021-07-13 20:41:00,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:00,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:00,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:00,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:00,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:00,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885921986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:00,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:00,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:00,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342669180] [2021-07-13 20:41:00,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:00,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:00,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:00,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:00,197 INFO L87 Difference]: Start difference. First operand 50627 states and 196067 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:01,659 INFO L93 Difference]: Finished difference Result 65905 states and 249272 transitions. [2021-07-13 20:41:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:41:01,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:02,115 INFO L225 Difference]: With dead ends: 65905 [2021-07-13 20:41:02,115 INFO L226 Difference]: Without dead ends: 65881 [2021-07-13 20:41:02,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:41:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65881 states. [2021-07-13 20:41:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65881 to 50613. [2021-07-13 20:41:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50613 states, 50612 states have (on average 3.872836481466846) internal successors, (196012), 50612 states have internal predecessors, (196012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50613 states to 50613 states and 196012 transitions. [2021-07-13 20:41:03,992 INFO L78 Accepts]: Start accepts. Automaton has 50613 states and 196012 transitions. Word has length 28 [2021-07-13 20:41:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:03,993 INFO L482 AbstractCegarLoop]: Abstraction has 50613 states and 196012 transitions. [2021-07-13 20:41:03,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 50613 states and 196012 transitions. [2021-07-13 20:41:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:04,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:04,333 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:04,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4075,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:04,551 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-07-13 20:41:04,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:04,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956393821] [2021-07-13 20:41:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:04,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:04,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956393821] [2021-07-13 20:41:04,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956393821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:04,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97067743] [2021-07-13 20:41:04,585 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:04,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:41:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:04,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97067743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:04,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:04,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:41:04,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477721498] [2021-07-13 20:41:04,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:04,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:04,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:04,673 INFO L87 Difference]: Start difference. First operand 50613 states and 196012 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:06,030 INFO L93 Difference]: Finished difference Result 65687 states and 248579 transitions. [2021-07-13 20:41:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:41:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-07-13 20:41:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:06,264 INFO L225 Difference]: With dead ends: 65687 [2021-07-13 20:41:06,265 INFO L226 Difference]: Without dead ends: 65647 [2021-07-13 20:41:06,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:41:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65647 states. [2021-07-13 20:41:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65647 to 50962. [2021-07-13 20:41:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 3.874354898844214) internal successors, (197441), 50961 states have internal predecessors, (197441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 197441 transitions. [2021-07-13 20:41:08,272 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 197441 transitions. Word has length 28 [2021-07-13 20:41:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:08,272 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 197441 transitions. [2021-07-13 20:41:08,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 197441 transitions. [2021-07-13 20:41:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:08,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:08,372 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:08,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-07-13 20:41:08,588 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:08,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-07-13 20:41:08,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:08,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652406584] [2021-07-13 20:41:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:08,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:08,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652406584] [2021-07-13 20:41:08,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652406584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:08,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354821458] [2021-07-13 20:41:08,651 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:08,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:08,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:08,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:08,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354821458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:08,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:08,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:08,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650852204] [2021-07-13 20:41:08,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:08,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:08,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:08,786 INFO L87 Difference]: Start difference. First operand 50962 states and 197441 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-13 20:41:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:10,605 INFO L93 Difference]: Finished difference Result 79769 states and 298419 transitions. [2021-07-13 20:41:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:41:10,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-07-13 20:41:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:10,872 INFO L225 Difference]: With dead ends: 79769 [2021-07-13 20:41:10,873 INFO L226 Difference]: Without dead ends: 79769 [2021-07-13 20:41:10,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 600.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:41:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79769 states. [2021-07-13 20:41:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79769 to 52128. [2021-07-13 20:41:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52128 states, 52127 states have (on average 3.8865846873980856) internal successors, (202596), 52127 states have internal predecessors, (202596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52128 states to 52128 states and 202596 transitions. [2021-07-13 20:41:13,028 INFO L78 Accepts]: Start accepts. Automaton has 52128 states and 202596 transitions. Word has length 28 [2021-07-13 20:41:13,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:13,028 INFO L482 AbstractCegarLoop]: Abstraction has 52128 states and 202596 transitions. [2021-07-13 20:41:13,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-13 20:41:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 52128 states and 202596 transitions. [2021-07-13 20:41:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:13,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:13,121 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:13,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-07-13 20:41:13,336 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:13,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-07-13 20:41:13,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:13,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55026163] [2021-07-13 20:41:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:13,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:13,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55026163] [2021-07-13 20:41:13,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55026163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:13,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357411080] [2021-07-13 20:41:13,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:13,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:13,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:13,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357411080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:13,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:13,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:13,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509307714] [2021-07-13 20:41:13,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:13,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:13,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:13,712 INFO L87 Difference]: Start difference. First operand 52128 states and 202596 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:15,204 INFO L93 Difference]: Finished difference Result 72910 states and 276752 transitions. [2021-07-13 20:41:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:41:15,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:15,447 INFO L225 Difference]: With dead ends: 72910 [2021-07-13 20:41:15,447 INFO L226 Difference]: Without dead ends: 72910 [2021-07-13 20:41:15,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:41:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72910 states. [2021-07-13 20:41:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72910 to 52158. [2021-07-13 20:41:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52158 states, 52157 states have (on average 3.886400674885442) internal successors, (202703), 52157 states have internal predecessors, (202703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52158 states to 52158 states and 202703 transitions. [2021-07-13 20:41:17,653 INFO L78 Accepts]: Start accepts. Automaton has 52158 states and 202703 transitions. Word has length 28 [2021-07-13 20:41:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:17,653 INFO L482 AbstractCegarLoop]: Abstraction has 52158 states and 202703 transitions. [2021-07-13 20:41:17,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 52158 states and 202703 transitions. [2021-07-13 20:41:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:17,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:17,745 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:17,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-07-13 20:41:17,961 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-07-13 20:41:17,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:17,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123173869] [2021-07-13 20:41:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:18,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:18,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123173869] [2021-07-13 20:41:18,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123173869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:18,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172720217] [2021-07-13 20:41:18,015 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:18,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:18,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:18,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:18,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172720217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:18,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:18,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:41:18,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046505688] [2021-07-13 20:41:18,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:18,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:18,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:18,157 INFO L87 Difference]: Start difference. First operand 52158 states and 202703 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:20,117 INFO L93 Difference]: Finished difference Result 73768 states and 279188 transitions. [2021-07-13 20:41:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:41:20,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:20,377 INFO L225 Difference]: With dead ends: 73768 [2021-07-13 20:41:20,377 INFO L226 Difference]: Without dead ends: 73768 [2021-07-13 20:41:20,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 875.6ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:41:20,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73768 states. [2021-07-13 20:41:22,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73768 to 52422. [2021-07-13 20:41:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52422 states, 52421 states have (on average 3.8831956658591023) internal successors, (203561), 52421 states have internal predecessors, (203561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52422 states to 52422 states and 203561 transitions. [2021-07-13 20:41:22,689 INFO L78 Accepts]: Start accepts. Automaton has 52422 states and 203561 transitions. Word has length 28 [2021-07-13 20:41:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:22,689 INFO L482 AbstractCegarLoop]: Abstraction has 52422 states and 203561 transitions. [2021-07-13 20:41:22,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 52422 states and 203561 transitions. [2021-07-13 20:41:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:22,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:22,804 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:23,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-07-13 20:41:23,021 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:23,021 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-07-13 20:41:23,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:23,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972204701] [2021-07-13 20:41:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:23,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972204701] [2021-07-13 20:41:23,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972204701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982063726] [2021-07-13 20:41:23,476 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:23,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:23,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982063726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:23,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:23,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:41:23,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570290827] [2021-07-13 20:41:23,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:23,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:23,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:23,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:23,642 INFO L87 Difference]: Start difference. First operand 52422 states and 203561 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:25,385 INFO L93 Difference]: Finished difference Result 72980 states and 276953 transitions. [2021-07-13 20:41:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:41:25,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:25,667 INFO L225 Difference]: With dead ends: 72980 [2021-07-13 20:41:25,667 INFO L226 Difference]: Without dead ends: 72976 [2021-07-13 20:41:25,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 1110.8ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:41:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72976 states. [2021-07-13 20:41:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72976 to 52058. [2021-07-13 20:41:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52058 states, 52057 states have (on average 3.8866050675221393) internal successors, (202325), 52057 states have internal predecessors, (202325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52058 states to 52058 states and 202325 transitions. [2021-07-13 20:41:28,034 INFO L78 Accepts]: Start accepts. Automaton has 52058 states and 202325 transitions. Word has length 28 [2021-07-13 20:41:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:28,034 INFO L482 AbstractCegarLoop]: Abstraction has 52058 states and 202325 transitions. [2021-07-13 20:41:28,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 52058 states and 202325 transitions. [2021-07-13 20:41:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:28,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:28,140 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:28,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4080 [2021-07-13 20:41:28,342 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:28,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:28,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-07-13 20:41:28,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:28,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378213641] [2021-07-13 20:41:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:28,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:28,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378213641] [2021-07-13 20:41:28,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378213641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:28,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567414454] [2021-07-13 20:41:28,781 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:41:28,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:28,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:28,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567414454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:28,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:28,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:28,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245461891] [2021-07-13 20:41:28,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:28,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:28,952 INFO L87 Difference]: Start difference. First operand 52058 states and 202325 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:30,325 INFO L93 Difference]: Finished difference Result 66943 states and 255942 transitions. [2021-07-13 20:41:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:41:30,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:30,637 INFO L225 Difference]: With dead ends: 66943 [2021-07-13 20:41:30,638 INFO L226 Difference]: Without dead ends: 66943 [2021-07-13 20:41:30,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:41:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66943 states. [2021-07-13 20:41:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66943 to 52074. [2021-07-13 20:41:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52074 states, 52073 states have (on average 3.8882530294010333) internal successors, (202473), 52073 states have internal predecessors, (202473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52074 states to 52074 states and 202473 transitions. [2021-07-13 20:41:32,878 INFO L78 Accepts]: Start accepts. Automaton has 52074 states and 202473 transitions. Word has length 28 [2021-07-13 20:41:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:32,878 INFO L482 AbstractCegarLoop]: Abstraction has 52074 states and 202473 transitions. [2021-07-13 20:41:32,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:32,878 INFO L276 IsEmpty]: Start isEmpty. Operand 52074 states and 202473 transitions. [2021-07-13 20:41:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:32,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:32,979 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:33,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:33,193 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-07-13 20:41:33,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:33,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50292458] [2021-07-13 20:41:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:33,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:33,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50292458] [2021-07-13 20:41:33,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50292458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:33,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494640533] [2021-07-13 20:41:33,233 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:33,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:41:33,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494640533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:33,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:33,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935197182] [2021-07-13 20:41:33,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:33,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:33,332 INFO L87 Difference]: Start difference. First operand 52074 states and 202473 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:34,323 INFO L93 Difference]: Finished difference Result 66257 states and 254067 transitions. [2021-07-13 20:41:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:41:34,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:34,594 INFO L225 Difference]: With dead ends: 66257 [2021-07-13 20:41:34,594 INFO L226 Difference]: Without dead ends: 66245 [2021-07-13 20:41:34,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:41:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66245 states. [2021-07-13 20:41:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66245 to 52008. [2021-07-13 20:41:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52008 states, 52007 states have (on average 3.889284134828004) internal successors, (202270), 52007 states have internal predecessors, (202270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52008 states to 52008 states and 202270 transitions. [2021-07-13 20:41:36,631 INFO L78 Accepts]: Start accepts. Automaton has 52008 states and 202270 transitions. Word has length 28 [2021-07-13 20:41:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:36,631 INFO L482 AbstractCegarLoop]: Abstraction has 52008 states and 202270 transitions. [2021-07-13 20:41:36,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 52008 states and 202270 transitions. [2021-07-13 20:41:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:36,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:36,745 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:36,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-07-13 20:41:36,962 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:36,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-07-13 20:41:36,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:36,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820594989] [2021-07-13 20:41:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:37,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:37,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820594989] [2021-07-13 20:41:37,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820594989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:37,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968065535] [2021-07-13 20:41:37,000 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:37,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:37,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:37,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:37,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968065535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:37,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:37,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:37,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93016041] [2021-07-13 20:41:37,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:37,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:37,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:37,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:37,526 INFO L87 Difference]: Start difference. First operand 52008 states and 202270 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:38,306 INFO L93 Difference]: Finished difference Result 56548 states and 217322 transitions. [2021-07-13 20:41:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:41:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:38,822 INFO L225 Difference]: With dead ends: 56548 [2021-07-13 20:41:38,822 INFO L226 Difference]: Without dead ends: 56548 [2021-07-13 20:41:38,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 732.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:41:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56548 states. [2021-07-13 20:41:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56548 to 52216. [2021-07-13 20:41:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52216 states, 52215 states have (on average 3.8870439528871015) internal successors, (202962), 52215 states have internal predecessors, (202962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52216 states to 52216 states and 202962 transitions. [2021-07-13 20:41:40,491 INFO L78 Accepts]: Start accepts. Automaton has 52216 states and 202962 transitions. Word has length 28 [2021-07-13 20:41:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,491 INFO L482 AbstractCegarLoop]: Abstraction has 52216 states and 202962 transitions. [2021-07-13 20:41:40,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 52216 states and 202962 transitions. [2021-07-13 20:41:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:40,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,586 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:40,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4083,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:40,801 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-07-13 20:41:40,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641207831] [2021-07-13 20:41:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641207831] [2021-07-13 20:41:40,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641207831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517922360] [2021-07-13 20:41:40,833 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:40,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:40,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:41,352 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:41:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517922360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:41,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:41,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638021237] [2021-07-13 20:41:41,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:41,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:41,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:41,428 INFO L87 Difference]: Start difference. First operand 52216 states and 202962 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:42,086 INFO L93 Difference]: Finished difference Result 56395 states and 216924 transitions. [2021-07-13 20:41:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:41:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:41:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:42,630 INFO L225 Difference]: With dead ends: 56395 [2021-07-13 20:41:42,630 INFO L226 Difference]: Without dead ends: 56391 [2021-07-13 20:41:42,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:41:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56391 states. [2021-07-13 20:41:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56391 to 52156. [2021-07-13 20:41:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52156 states, 52155 states have (on average 3.887834339948231) internal successors, (202770), 52155 states have internal predecessors, (202770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52156 states to 52156 states and 202770 transitions. [2021-07-13 20:41:44,241 INFO L78 Accepts]: Start accepts. Automaton has 52156 states and 202770 transitions. Word has length 28 [2021-07-13 20:41:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:44,241 INFO L482 AbstractCegarLoop]: Abstraction has 52156 states and 202770 transitions. [2021-07-13 20:41:44,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 52156 states and 202770 transitions. [2021-07-13 20:41:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:44,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:44,333 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:44,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-07-13 20:41:44,549 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 80 times [2021-07-13 20:41:44,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:44,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744948482] [2021-07-13 20:41:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:44,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744948482] [2021-07-13 20:41:44,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744948482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136151377] [2021-07-13 20:41:44,586 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:44,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:44,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:44,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:44,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136151377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:44,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:41:44,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179898053] [2021-07-13 20:41:44,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:44,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:44,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:44,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:44,663 INFO L87 Difference]: Start difference. First operand 52156 states and 202770 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:45,527 INFO L93 Difference]: Finished difference Result 56442 states and 217026 transitions. [2021-07-13 20:41:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:41:45,527 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 [2021-07-13 20:41:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:45,720 INFO L225 Difference]: With dead ends: 56442 [2021-07-13 20:41:45,720 INFO L226 Difference]: Without dead ends: 56442 [2021-07-13 20:41:45,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:41:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56442 states. [2021-07-13 20:41:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56442 to 52260. [2021-07-13 20:41:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52260 states, 52259 states have (on average 3.88629709715073) internal successors, (203094), 52259 states have internal predecessors, (203094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52260 states to 52260 states and 203094 transitions. [2021-07-13 20:41:47,506 INFO L78 Accepts]: Start accepts. Automaton has 52260 states and 203094 transitions. Word has length 28 [2021-07-13 20:41:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:47,506 INFO L482 AbstractCegarLoop]: Abstraction has 52260 states and 203094 transitions. [2021-07-13 20:41:47,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 52260 states and 203094 transitions. [2021-07-13 20:41:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:47,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:47,603 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:47,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:47,820 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:47,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:47,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 81 times [2021-07-13 20:41:47,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:47,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187712242] [2021-07-13 20:41:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:47,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187712242] [2021-07-13 20:41:47,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187712242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73752057] [2021-07-13 20:41:47,850 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:47,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:41:47,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:47,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:47,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:47,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73752057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:47,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:41:47,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474207812] [2021-07-13 20:41:47,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:47,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:47,926 INFO L87 Difference]: Start difference. First operand 52260 states and 203094 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:48,684 INFO L93 Difference]: Finished difference Result 56568 states and 217524 transitions. [2021-07-13 20:41:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:41:48,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 [2021-07-13 20:41:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:48,884 INFO L225 Difference]: With dead ends: 56568 [2021-07-13 20:41:48,884 INFO L226 Difference]: Without dead ends: 56556 [2021-07-13 20:41:48,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:41:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56556 states. [2021-07-13 20:41:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56556 to 52394. [2021-07-13 20:41:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8846601645257954) internal successors, (203529), 52393 states have internal predecessors, (203529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203529 transitions. [2021-07-13 20:41:50,812 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203529 transitions. Word has length 28 [2021-07-13 20:41:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:50,813 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203529 transitions. [2021-07-13 20:41:50,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203529 transitions. [2021-07-13 20:41:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:50,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:50,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:51,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-07-13 20:41:51,123 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 82 times [2021-07-13 20:41:51,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:51,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89586895] [2021-07-13 20:41:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:51,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:51,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89586895] [2021-07-13 20:41:51,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89586895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:51,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568680645] [2021-07-13 20:41:51,159 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:51,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:51,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:51,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:51,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568680645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:51,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:51,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:41:51,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131196891] [2021-07-13 20:41:51,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:51,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:51,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:51,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:51,231 INFO L87 Difference]: Start difference. First operand 52394 states and 203529 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:52,083 INFO L93 Difference]: Finished difference Result 56532 states and 217440 transitions. [2021-07-13 20:41:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:41:52,083 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 [2021-07-13 20:41:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:52,303 INFO L225 Difference]: With dead ends: 56532 [2021-07-13 20:41:52,303 INFO L226 Difference]: Without dead ends: 56512 [2021-07-13 20:41:52,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:41:52,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56512 states. [2021-07-13 20:41:53,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56512 to 52394. [2021-07-13 20:41:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8845838184490296) internal successors, (203525), 52393 states have internal predecessors, (203525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203525 transitions. [2021-07-13 20:41:54,326 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203525 transitions. Word has length 28 [2021-07-13 20:41:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:54,326 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203525 transitions. [2021-07-13 20:41:54,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203525 transitions. [2021-07-13 20:41:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:54,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:54,460 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:54,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-07-13 20:41:54,677 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:54,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:54,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-07-13 20:41:54,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:54,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185325447] [2021-07-13 20:41:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:54,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185325447] [2021-07-13 20:41:54,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185325447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913424967] [2021-07-13 20:41:54,712 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:54,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:54,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:54,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913424967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:54,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:54,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732029811] [2021-07-13 20:41:54,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:54,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:54,804 INFO L87 Difference]: Start difference. First operand 52394 states and 203525 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:41:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:55,652 INFO L93 Difference]: Finished difference Result 57355 states and 221090 transitions. [2021-07-13 20:41:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:41:55,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:41:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:55,882 INFO L225 Difference]: With dead ends: 57355 [2021-07-13 20:41:55,883 INFO L226 Difference]: Without dead ends: 57342 [2021-07-13 20:41:55,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:41:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57342 states. [2021-07-13 20:41:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57342 to 55127. [2021-07-13 20:41:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55127 states, 55126 states have (on average 3.891321699379603) internal successors, (214513), 55126 states have internal predecessors, (214513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55127 states to 55127 states and 214513 transitions. [2021-07-13 20:41:57,687 INFO L78 Accepts]: Start accepts. Automaton has 55127 states and 214513 transitions. Word has length 28 [2021-07-13 20:41:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:57,687 INFO L482 AbstractCegarLoop]: Abstraction has 55127 states and 214513 transitions. [2021-07-13 20:41:57,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:41:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 55127 states and 214513 transitions. [2021-07-13 20:41:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:58,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:58,272 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:58,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-07-13 20:41:58,486 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:58,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-07-13 20:41:58,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:58,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555783992] [2021-07-13 20:41:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:58,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:58,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555783992] [2021-07-13 20:41:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555783992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194817528] [2021-07-13 20:41:58,518 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:58,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194817528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:58,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:58,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96287169] [2021-07-13 20:41:58,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:58,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:58,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:58,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:58,606 INFO L87 Difference]: Start difference. First operand 55127 states and 214513 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:41:59,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:59,611 INFO L93 Difference]: Finished difference Result 61086 states and 233937 transitions. [2021-07-13 20:41:59,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:41:59,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:41:59,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:59,933 INFO L225 Difference]: With dead ends: 61086 [2021-07-13 20:41:59,934 INFO L226 Difference]: Without dead ends: 61086 [2021-07-13 20:41:59,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:42:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61086 states. [2021-07-13 20:42:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61086 to 48711. [2021-07-13 20:42:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48711 states, 48710 states have (on average 3.8803736399096693) internal successors, (189013), 48710 states have internal predecessors, (189013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48711 states to 48711 states and 189013 transitions. [2021-07-13 20:42:01,580 INFO L78 Accepts]: Start accepts. Automaton has 48711 states and 189013 transitions. Word has length 28 [2021-07-13 20:42:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:01,580 INFO L482 AbstractCegarLoop]: Abstraction has 48711 states and 189013 transitions. [2021-07-13 20:42:01,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:42:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 48711 states and 189013 transitions. [2021-07-13 20:42:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:01,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:01,667 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:01,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-07-13 20:42:01,883 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:01,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:01,883 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-07-13 20:42:01,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:01,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494096027] [2021-07-13 20:42:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:01,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:01,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494096027] [2021-07-13 20:42:01,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494096027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757817291] [2021-07-13 20:42:01,915 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:01,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:01,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:01,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:01,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757817291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:02,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:42:02,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901256028] [2021-07-13 20:42:02,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:02,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:02,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:02,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:02,006 INFO L87 Difference]: Start difference. First operand 48711 states and 189013 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:42:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:02,822 INFO L93 Difference]: Finished difference Result 53676 states and 205772 transitions. [2021-07-13 20:42:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:42:02,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:42:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:03,007 INFO L225 Difference]: With dead ends: 53676 [2021-07-13 20:42:03,007 INFO L226 Difference]: Without dead ends: 53676 [2021-07-13 20:42:03,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 394.7ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:42:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53676 states. [2021-07-13 20:42:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53676 to 49544. [2021-07-13 20:42:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49544 states, 49543 states have (on average 3.878872898290374) internal successors, (192171), 49543 states have internal predecessors, (192171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49544 states to 49544 states and 192171 transitions. [2021-07-13 20:42:04,722 INFO L78 Accepts]: Start accepts. Automaton has 49544 states and 192171 transitions. Word has length 28 [2021-07-13 20:42:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:04,722 INFO L482 AbstractCegarLoop]: Abstraction has 49544 states and 192171 transitions. [2021-07-13 20:42:04,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-07-13 20:42:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 49544 states and 192171 transitions. [2021-07-13 20:42:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:04,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:04,810 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:05,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:05,025 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:05,026 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-07-13 20:42:05,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:05,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424156444] [2021-07-13 20:42:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:05,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:05,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424156444] [2021-07-13 20:42:05,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424156444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072484381] [2021-07-13 20:42:05,063 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:05,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:42:05,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:05,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:42:05,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:05,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072484381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:05,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:42:05,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860188907] [2021-07-13 20:42:05,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:05,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:05,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:05,197 INFO L87 Difference]: Start difference. First operand 49544 states and 192171 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:06,056 INFO L93 Difference]: Finished difference Result 52408 states and 201958 transitions. [2021-07-13 20:42:06,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:42:06,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 28 [2021-07-13 20:42:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:06,245 INFO L225 Difference]: With dead ends: 52408 [2021-07-13 20:42:06,245 INFO L226 Difference]: Without dead ends: 52408 [2021-07-13 20:42:06,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:42:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52408 states. [2021-07-13 20:42:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52408 to 49552. [2021-07-13 20:42:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49552 states, 49551 states have (on average 3.8787310044196888) internal successors, (192195), 49551 states have internal predecessors, (192195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49552 states to 49552 states and 192195 transitions. [2021-07-13 20:42:07,689 INFO L78 Accepts]: Start accepts. Automaton has 49552 states and 192195 transitions. Word has length 28 [2021-07-13 20:42:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:07,689 INFO L482 AbstractCegarLoop]: Abstraction has 49552 states and 192195 transitions. [2021-07-13 20:42:07,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 49552 states and 192195 transitions. [2021-07-13 20:42:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:07,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:07,814 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:08,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:08,037 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-07-13 20:42:08,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:08,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829497663] [2021-07-13 20:42:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:08,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:08,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829497663] [2021-07-13 20:42:08,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829497663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866118749] [2021-07-13 20:42:08,286 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:42:08,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:08,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:08,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:08,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:08,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866118749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:08,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:42:08,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309811080] [2021-07-13 20:42:08,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:08,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:08,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:08,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:08,421 INFO L87 Difference]: Start difference. First operand 49552 states and 192195 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:09,055 INFO L93 Difference]: Finished difference Result 51100 states and 197405 transitions. [2021-07-13 20:42:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:42:09,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:42:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:09,269 INFO L225 Difference]: With dead ends: 51100 [2021-07-13 20:42:09,269 INFO L226 Difference]: Without dead ends: 51100 [2021-07-13 20:42:09,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:42:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51100 states. [2021-07-13 20:42:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51100 to 49446. [2021-07-13 20:42:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49446 states, 49445 states have (on average 3.878471028415411) internal successors, (191771), 49445 states have internal predecessors, (191771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49446 states to 49446 states and 191771 transitions. [2021-07-13 20:42:11,067 INFO L78 Accepts]: Start accepts. Automaton has 49446 states and 191771 transitions. Word has length 28 [2021-07-13 20:42:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:11,067 INFO L482 AbstractCegarLoop]: Abstraction has 49446 states and 191771 transitions. [2021-07-13 20:42:11,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 49446 states and 191771 transitions. [2021-07-13 20:42:11,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:11,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:11,167 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:11,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:11,381 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:11,381 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-07-13 20:42:11,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:11,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057591393] [2021-07-13 20:42:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:11,742 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-13 20:42:11,876 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-13 20:42:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:12,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:12,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057591393] [2021-07-13 20:42:12,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057591393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:12,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560539061] [2021-07-13 20:42:12,230 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:12,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:12,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:12,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:42:12,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:12,558 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-07-13 20:42:12,836 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:42:13,083 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:42:13,679 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2021-07-13 20:42:14,016 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:42:14,220 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 20:42:14,453 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_558, A, v_prenex_560, v_prenex_562, v_prenex_564, v_prenex_566], 6=[v_prenex_554, v_prenex_556]} [2021-07-13 20:42:14,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:14,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:14,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:14,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:14,466 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 38 treesize of output 22 [2021-07-13 20:42:14,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:14,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:14,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:14,477 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 33 treesize of output 19 [2021-07-13 20:42:14,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,051 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 143 [2021-07-13 20:42:15,051 INFO L628 ElimStorePlain]: treesize reduction 280, result has 60.3 percent of original size [2021-07-13 20:42:15,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:15,060 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 33 treesize of output 19 [2021-07-13 20:42:15,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,238 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-13 20:42:15,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:15,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:15,249 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 35 treesize of output 19 [2021-07-13 20:42:15,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:42:15,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,412 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:42:15,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:42:15,424 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,431 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 40 treesize of output 22 [2021-07-13 20:42:15,432 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,560 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:42:15,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:15,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,567 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 35 treesize of output 19 [2021-07-13 20:42:15,568 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,689 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:42:15,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:15,697 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 35 treesize of output 19 [2021-07-13 20:42:15,698 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,812 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:42:15,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:15,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,819 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 28 treesize of output 16 [2021-07-13 20:42:15,821 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:15,927 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:42:15,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:15,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:15,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-07-13 20:42:15,934 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:16,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:16,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-13 20:42:16,039 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:757, output treesize:114 [2021-07-13 20:42:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:16,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560539061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:16,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:16,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:42:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639612545] [2021-07-13 20:42:16,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:42:16,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:16,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:42:16,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:16,131 INFO L87 Difference]: Start difference. First operand 49446 states and 191771 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:16,553 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2021-07-13 20:42:17,004 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2021-07-13 20:42:17,154 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-07-13 20:42:17,642 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 79 [2021-07-13 20:42:17,980 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2021-07-13 20:42:18,335 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-07-13 20:42:18,978 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 93 [2021-07-13 20:42:19,612 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 84 [2021-07-13 20:42:19,867 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-07-13 20:42:20,056 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-07-13 20:42:20,640 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 96 [2021-07-13 20:42:21,117 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2021-07-13 20:42:21,699 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 112 [2021-07-13 20:42:22,775 WARN L205 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 153 [2021-07-13 20:42:23,219 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-07-13 20:42:23,641 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2021-07-13 20:42:24,015 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-13 20:42:24,624 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-07-13 20:42:25,005 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-07-13 20:42:25,341 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 56 [2021-07-13 20:42:25,793 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2021-07-13 20:42:25,974 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 42 [2021-07-13 20:42:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:26,466 INFO L93 Difference]: Finished difference Result 57718 states and 215952 transitions. [2021-07-13 20:42:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:42:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:26,695 INFO L225 Difference]: With dead ends: 57718 [2021-07-13 20:42:26,695 INFO L226 Difference]: Without dead ends: 57628 [2021-07-13 20:42:26,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 11218.1ms TimeCoverageRelationStatistics Valid=458, Invalid=1992, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:42:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57628 states. [2021-07-13 20:42:28,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57628 to 49581. [2021-07-13 20:42:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49581 states, 49580 states have (on average 3.8776926179911255) internal successors, (192256), 49580 states have internal predecessors, (192256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49581 states to 49581 states and 192256 transitions. [2021-07-13 20:42:28,512 INFO L78 Accepts]: Start accepts. Automaton has 49581 states and 192256 transitions. Word has length 30 [2021-07-13 20:42:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:28,513 INFO L482 AbstractCegarLoop]: Abstraction has 49581 states and 192256 transitions. [2021-07-13 20:42:28,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 49581 states and 192256 transitions. [2021-07-13 20:42:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:28,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:28,617 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:28,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:28,826 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-07-13 20:42:28,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:28,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430332243] [2021-07-13 20:42:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:29,182 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-07-13 20:42:29,690 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-13 20:42:29,869 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-13 20:42:29,989 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:42:30,109 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 20:42:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:30,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:30,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430332243] [2021-07-13 20:42:30,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430332243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:30,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955777661] [2021-07-13 20:42:30,213 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:30,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:30,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:42:30,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:30,602 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:42:30,858 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:42:30,979 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-07-13 20:42:31,523 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-07-13 20:42:31,739 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:42:32,456 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 131 [2021-07-13 20:42:32,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:32,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:32,550 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 35 treesize of output 19 [2021-07-13 20:42:32,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:32,980 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2021-07-13 20:42:32,981 INFO L628 ElimStorePlain]: treesize reduction 86, result has 82.7 percent of original size [2021-07-13 20:42:32,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:32,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:32,990 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 40 treesize of output 22 [2021-07-13 20:42:32,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,170 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-07-13 20:42:33,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:33,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:33,180 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 33 treesize of output 19 [2021-07-13 20:42:33,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,354 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-13 20:42:33,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:33,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:33,363 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 35 treesize of output 19 [2021-07-13 20:42:33,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,532 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:42:33,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:33,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:42:33,542 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,689 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:42:33,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:33,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:42:33,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,839 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:42:33,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:33,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:33,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,848 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 35 treesize of output 19 [2021-07-13 20:42:33,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:33,986 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:42:33,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:33,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:33,994 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 35 treesize of output 19 [2021-07-13 20:42:33,995 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:34,119 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:42:34,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:34,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:34,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:34,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:34,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:34,130 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 33 treesize of output 19 [2021-07-13 20:42:34,131 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:34,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:34,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:34,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:34,138 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 26 treesize of output 16 [2021-07-13 20:42:34,140 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:34,252 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:42:34,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:42:34,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 9 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-13 20:42:34,258 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 27 variables, input treesize:525, output treesize:114 [2021-07-13 20:42:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:34,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955777661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:34,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:34,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:42:34,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090746977] [2021-07-13 20:42:34,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:42:34,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:34,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:42:34,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:34,373 INFO L87 Difference]: Start difference. First operand 49581 states and 192256 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,835 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 44 [2021-07-13 20:42:35,362 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-13 20:42:35,707 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 70 [2021-07-13 20:42:35,973 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2021-07-13 20:42:36,106 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-07-13 20:42:36,854 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 89 [2021-07-13 20:42:37,575 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2021-07-13 20:42:37,717 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-13 20:42:38,663 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-07-13 20:42:39,021 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:42:39,518 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 102 [2021-07-13 20:42:39,729 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-07-13 20:42:40,022 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-13 20:42:40,348 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-07-13 20:42:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:40,740 INFO L93 Difference]: Finished difference Result 52816 states and 201749 transitions. [2021-07-13 20:42:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:42:40,740 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:40,955 INFO L225 Difference]: With dead ends: 52816 [2021-07-13 20:42:40,955 INFO L226 Difference]: Without dead ends: 52771 [2021-07-13 20:42:40,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 8088.8ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:42:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52771 states. [2021-07-13 20:42:42,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52771 to 49618. [2021-07-13 20:42:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49618 states, 49617 states have (on average 3.877360582058569) internal successors, (192383), 49617 states have internal predecessors, (192383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49618 states to 49618 states and 192383 transitions. [2021-07-13 20:42:42,823 INFO L78 Accepts]: Start accepts. Automaton has 49618 states and 192383 transitions. Word has length 30 [2021-07-13 20:42:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:42,823 INFO L482 AbstractCegarLoop]: Abstraction has 49618 states and 192383 transitions. [2021-07-13 20:42:42,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 49618 states and 192383 transitions. [2021-07-13 20:42:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:42:42,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:42,928 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:43,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-07-13 20:42:43,137 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-07-13 20:42:43,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:43,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660727568] [2021-07-13 20:42:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:43,570 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-07-13 20:42:43,754 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2021-07-13 20:42:44,020 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-07-13 20:42:44,428 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2021-07-13 20:42:44,704 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-07-13 20:42:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:44,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:44,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660727568] [2021-07-13 20:42:44,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660727568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:44,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401675057] [2021-07-13 20:42:44,843 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:44,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:42:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:46,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,139 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 42 treesize of output 22 [2021-07-13 20:42:46,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,152 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 43 treesize of output 22 [2021-07-13 20:42:46,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,166 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 51 treesize of output 25 [2021-07-13 20:42:46,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,183 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 52 treesize of output 28 [2021-07-13 20:42:46,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,199 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 48 treesize of output 22 [2021-07-13 20:42:46,199 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,214 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 51 treesize of output 25 [2021-07-13 20:42:46,215 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,230 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 47 treesize of output 25 [2021-07-13 20:42:46,230 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,245 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 56 treesize of output 22 [2021-07-13 20:42:46,246 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,260 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 44 treesize of output 19 [2021-07-13 20:42:46,261 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,275 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 42 treesize of output 22 [2021-07-13 20:42:46,276 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,292 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 47 treesize of output 25 [2021-07-13 20:42:46,293 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,307 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 [2021-07-13 20:42:46,308 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,323 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 22 [2021-07-13 20:42:46,324 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,338 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 47 treesize of output 25 [2021-07-13 20:42:46,339 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-07-13 20:42:46,354 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,368 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 42 treesize of output 22 [2021-07-13 20:42:46,369 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,385 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 33 treesize of output 16 [2021-07-13 20:42:46,386 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,401 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 [2021-07-13 20:42:46,402 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,419 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 40 treesize of output 22 [2021-07-13 20:42:46,419 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,434 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 38 treesize of output 16 [2021-07-13 20:42:46,436 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,451 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 45 treesize of output 25 [2021-07-13 20:42:46,452 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,465 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 42 treesize of output 22 [2021-07-13 20:42:46,466 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-13 20:42:46,481 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-07-13 20:42:46,496 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,510 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 [2021-07-13 20:42:46,510 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,525 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 44 treesize of output 16 [2021-07-13 20:42:46,526 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,546 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 51 treesize of output 22 [2021-07-13 20:42:46,546 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-07-13 20:42:46,576 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,590 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 44 treesize of output 22 [2021-07-13 20:42:46,591 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,604 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 42 treesize of output 22 [2021-07-13 20:42:46,605 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,618 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 38 treesize of output 16 [2021-07-13 20:42:46,619 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,632 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 40 treesize of output 22 [2021-07-13 20:42:46,633 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,648 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 56 treesize of output 25 [2021-07-13 20:42:46,649 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,665 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 42 treesize of output 22 [2021-07-13 20:42:46,666 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:42:46,681 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2021-07-13 20:42:46,695 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,708 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 42 treesize of output 22 [2021-07-13 20:42:46,709 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,722 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 39 treesize of output 19 [2021-07-13 20:42:46,723 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,736 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 22 [2021-07-13 20:42:46,737 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,750 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 51 treesize of output 25 [2021-07-13 20:42:46,751 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,764 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 47 treesize of output 25 [2021-07-13 20:42:46,765 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,778 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 47 treesize of output 25 [2021-07-13 20:42:46,779 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,795 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 47 treesize of output 25 [2021-07-13 20:42:46,796 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,810 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 51 treesize of output 25 [2021-07-13 20:42:46,811 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,824 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 51 treesize of output 25 [2021-07-13 20:42:46,825 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,838 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 [2021-07-13 20:42:46,839 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,853 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 45 treesize of output 25 [2021-07-13 20:42:46,854 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,867 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 43 treesize of output 22 [2021-07-13 20:42:46,868 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,881 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 50 treesize of output 28 [2021-07-13 20:42:46,882 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,895 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 37 treesize of output 19 [2021-07-13 20:42:46,896 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,909 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 47 treesize of output 25 [2021-07-13 20:42:46,910 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:42:46,923 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,936 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 51 treesize of output 22 [2021-07-13 20:42:46,937 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 25 [2021-07-13 20:42:46,950 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,963 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 [2021-07-13 20:42:46,964 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,976 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 42 treesize of output 22 [2021-07-13 20:42:46,977 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,990 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 47 treesize of output 25 [2021-07-13 20:42:46,990 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:46,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:46,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:46,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,003 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 [2021-07-13 20:42:47,003 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,015 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 47 treesize of output 25 [2021-07-13 20:42:47,016 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,028 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 42 treesize of output 22 [2021-07-13 20:42:47,029 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,040 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 [2021-07-13 20:42:47,041 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,052 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 51 treesize of output 25 [2021-07-13 20:42:47,053 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:42:47,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:42:47,059 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 50 treesize of output 28 [2021-07-13 20:42:47,059 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-07-13 20:42:47,151 INFO L628 ElimStorePlain]: treesize reduction 160, result has 31.9 percent of original size [2021-07-13 20:42:47,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:42:47,153 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3472, output treesize:51 [2021-07-13 20:42:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:47,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401675057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:47,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:47,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:42:47,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635713197] [2021-07-13 20:42:47,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:42:47,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:47,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:42:47,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:47,217 INFO L87 Difference]: Start difference. First operand 49618 states and 192383 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:48,470 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 81 [2021-07-13 20:42:48,906 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 73 [2021-07-13 20:42:49,051 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-07-13 20:42:49,404 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 80 [2021-07-13 20:42:50,132 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 81 [2021-07-13 20:42:50,668 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 106 [2021-07-13 20:42:50,997 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 89 [2021-07-13 20:42:51,209 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:42:51,500 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 85 [2021-07-13 20:42:51,698 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-07-13 20:42:52,088 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 81 [2021-07-13 20:42:52,268 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-07-13 20:42:52,696 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 88 [2021-07-13 20:42:52,954 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 70 [2021-07-13 20:42:53,335 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 84 [2021-07-13 20:42:53,599 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 84 [2021-07-13 20:42:54,054 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 99 [2021-07-13 20:42:54,325 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:42:54,528 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 66 [2021-07-13 20:42:54,889 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:42:55,272 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 85 [2021-07-13 20:42:55,465 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2021-07-13 20:42:55,867 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 86 [2021-07-13 20:42:56,127 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 70 [2021-07-13 20:42:56,464 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2021-07-13 20:42:56,749 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2021-07-13 20:42:57,048 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-07-13 20:42:57,372 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-07-13 20:42:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:57,884 INFO L93 Difference]: Finished difference Result 70379 states and 263440 transitions. [2021-07-13 20:42:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:42:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:42:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:58,117 INFO L225 Difference]: With dead ends: 70379 [2021-07-13 20:42:58,118 INFO L226 Difference]: Without dead ends: 70349 [2021-07-13 20:42:58,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 11012.9ms TimeCoverageRelationStatistics Valid=537, Invalid=3623, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:42:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70349 states. [2021-07-13 20:42:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70349 to 49657. [2021-07-13 20:42:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49657 states, 49656 states have (on average 3.877094409537619) internal successors, (192521), 49656 states have internal predecessors, (192521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49657 states to 49657 states and 192521 transitions. [2021-07-13 20:42:59,974 INFO L78 Accepts]: Start accepts. Automaton has 49657 states and 192521 transitions. Word has length 30 [2021-07-13 20:42:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:59,974 INFO L482 AbstractCegarLoop]: Abstraction has 49657 states and 192521 transitions. [2021-07-13 20:42:59,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 49657 states and 192521 transitions. [2021-07-13 20:43:00,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:00,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:00,064 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:00,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4171,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:00,683 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-07-13 20:43:00,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:00,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299954500] [2021-07-13 20:43:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:01,052 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-07-13 20:43:01,325 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-13 20:43:01,514 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-13 20:43:01,637 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-13 20:43:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:01,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:01,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299954500] [2021-07-13 20:43:01,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299954500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555745482] [2021-07-13 20:43:01,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:01,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:01,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:01,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:43:01,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:02,349 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-07-13 20:43:02,554 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:43:03,050 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2021-07-13 20:43:03,560 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-13 20:43:03,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:03,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 62 [2021-07-13 20:43:03,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:04,879 WARN L205 SmtUtils]: Spent 954.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 338 [2021-07-13 20:43:04,880 INFO L628 ElimStorePlain]: treesize reduction 28, result has 96.9 percent of original size [2021-07-13 20:43:04,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:04,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-07-13 20:43:04,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:05,396 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2021-07-13 20:43:05,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:05,464 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:43:05,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:43:05,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:05,915 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2021-07-13 20:43:05,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:05,977 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:43:05,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:43:05,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,429 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2021-07-13 20:43:06,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:06,493 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:43:06,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 50 [2021-07-13 20:43:06,495 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:06,916 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2021-07-13 20:43:06,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:06,985 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:43:06,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 43 [2021-07-13 20:43:06,987 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:07,440 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2021-07-13 20:43:07,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:07,505 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:43:07,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 54 [2021-07-13 20:43:07,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:07,941 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2021-07-13 20:43:07,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:08,009 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:43:08,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-07-13 20:43:08,029 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:08,902 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 318 [2021-07-13 20:43:08,903 INFO L628 ElimStorePlain]: treesize reduction 9, result has 98.9 percent of original size [2021-07-13 20:43:08,973 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:43:08,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 58 [2021-07-13 20:43:08,982 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:09,844 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 315 [2021-07-13 20:43:09,845 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.1 percent of original size [2021-07-13 20:43:09,907 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:43:09,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:43:09,917 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:10,762 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 309 [2021-07-13 20:43:10,763 INFO L628 ElimStorePlain]: treesize reduction 32, result has 96.1 percent of original size [2021-07-13 20:43:10,826 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:43:10,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 54 [2021-07-13 20:43:10,829 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:11,254 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2021-07-13 20:43:11,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:11,324 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-13 20:43:11,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-13 20:43:11,344 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:12,143 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 301 [2021-07-13 20:43:12,144 INFO L628 ElimStorePlain]: treesize reduction 9, result has 98.8 percent of original size [2021-07-13 20:43:12,191 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-07-13 20:43:12,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 39 [2021-07-13 20:43:12,192 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:12,567 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2021-07-13 20:43:12,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:12,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:12,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 62 [2021-07-13 20:43:12,621 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:13,380 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 297 [2021-07-13 20:43:13,381 INFO L628 ElimStorePlain]: treesize reduction 25, result has 96.8 percent of original size [2021-07-13 20:43:13,442 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:43:13,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:43:13,447 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:13,808 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2021-07-13 20:43:13,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:13,858 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:43:13,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:43:13,863 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:14,244 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-07-13 20:43:14,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:14,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 32 dim-0 vars, 16 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-07-13 20:43:14,387 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 48 variables, input treesize:877, output treesize:1238 [2021-07-13 20:43:14,911 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 48 [2021-07-13 20:43:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:15,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555745482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:15,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:15,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:43:15,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518423197] [2021-07-13 20:43:15,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:43:15,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:15,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:43:15,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:43:15,028 INFO L87 Difference]: Start difference. First operand 49657 states and 192521 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:15,234 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 36 [2021-07-13 20:43:15,612 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 47 [2021-07-13 20:43:16,196 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 86 [2021-07-13 20:43:16,593 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2021-07-13 20:43:16,773 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-07-13 20:43:17,094 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-07-13 20:43:17,388 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2021-07-13 20:43:17,655 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 55 [2021-07-13 20:43:18,084 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 71 [2021-07-13 20:43:18,598 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 89 [2021-07-13 20:43:18,916 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 56 [2021-07-13 20:43:19,089 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-07-13 20:43:19,306 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 58 [2021-07-13 20:43:20,194 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 113 [2021-07-13 20:43:20,995 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 76 [2021-07-13 20:43:21,438 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 89 [2021-07-13 20:43:22,484 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 103 [2021-07-13 20:43:22,922 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-07-13 20:43:23,850 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 153 [2021-07-13 20:43:24,145 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 74 [2021-07-13 20:43:24,538 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-07-13 20:43:25,474 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 157 [2021-07-13 20:43:26,325 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 141 [2021-07-13 20:43:27,007 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 97 [2021-07-13 20:43:27,388 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-07-13 20:43:28,328 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 138 [2021-07-13 20:43:28,977 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 83 [2021-07-13 20:43:29,898 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 120 [2021-07-13 20:43:31,556 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 215 DAG size of output: 160 [2021-07-13 20:43:31,974 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-07-13 20:43:32,534 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 59 [2021-07-13 20:43:33,032 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 58 [2021-07-13 20:43:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:33,308 INFO L93 Difference]: Finished difference Result 63922 states and 240994 transitions. [2021-07-13 20:43:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:43:33,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:43:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:33,528 INFO L225 Difference]: With dead ends: 63922 [2021-07-13 20:43:33,529 INFO L226 Difference]: Without dead ends: 63892 [2021-07-13 20:43:33,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 19330.2ms TimeCoverageRelationStatistics Valid=636, Invalid=3524, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:43:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63892 states. [2021-07-13 20:43:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63892 to 49681. [2021-07-13 20:43:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49681 states, 49680 states have (on average 3.8768719806763285) internal successors, (192603), 49680 states have internal predecessors, (192603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49681 states to 49681 states and 192603 transitions. [2021-07-13 20:43:35,165 INFO L78 Accepts]: Start accepts. Automaton has 49681 states and 192603 transitions. Word has length 30 [2021-07-13 20:43:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:35,166 INFO L482 AbstractCegarLoop]: Abstraction has 49681 states and 192603 transitions. [2021-07-13 20:43:35,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 49681 states and 192603 transitions. [2021-07-13 20:43:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:43:35,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:35,255 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:35,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4432,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:35,471 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 177 times [2021-07-13 20:43:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:35,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245145429] [2021-07-13 20:43:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:36,429 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-07-13 20:43:36,704 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2021-07-13 20:43:37,036 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-07-13 20:43:37,365 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:43:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:37,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245145429] [2021-07-13 20:43:37,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245145429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554067116] [2021-07-13 20:43:37,581 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:37,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:43:37,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:37,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:43:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:38,011 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-07-13 20:43:38,253 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 20:43:38,566 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:43:39,045 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2021-07-13 20:43:39,577 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:43:40,156 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 185 [2021-07-13 20:43:40,600 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-07-13 20:43:40,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:40,941 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-07-13 20:43:40,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 64 [2021-07-13 20:43:40,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:40,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,033 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:43:41,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 56 [2021-07-13 20:43:41,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,120 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-13 20:43:41,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 49 [2021-07-13 20:43:41,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:41,192 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-07-13 20:43:41,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 54 [2021-07-13 20:43:41,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:41,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,292 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-07-13 20:43:41,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 64 [2021-07-13 20:43:41,301 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:41,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,394 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:43:41,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 51 treesize of output 59 [2021-07-13 20:43:41,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:41,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,481 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-13 20:43:41,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 51 treesize of output 55 [2021-07-13 20:43:41,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:41,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,566 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-13 20:43:41,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 49 [2021-07-13 20:43:41,568 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:41,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:41,658 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:43:41,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 53 [2021-07-13 20:43:41,663 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:41,734 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:43:41,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 56 [2021-07-13 20:43:41,737 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:43,617 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 354 DAG size of output: 326 [2021-07-13 20:43:43,618 INFO L628 ElimStorePlain]: treesize reduction 97, result has 91.9 percent of original size [2021-07-13 20:43:43,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:43,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:43,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:43,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:43,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 68 [2021-07-13 20:43:43,701 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:43,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:43,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:43,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:43,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:43,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 68 [2021-07-13 20:43:43,786 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:43,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:43,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:43,862 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:43:43,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 53 [2021-07-13 20:43:43,869 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:43,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:43,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:43,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:43,956 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:43:43,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 56 [2021-07-13 20:43:43,959 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:43,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:43,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:43,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:44,036 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:43:44,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 56 [2021-07-13 20:43:44,040 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:44,107 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-13 20:43:44,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 50 [2021-07-13 20:43:44,115 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:44,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:44,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:44,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:43:44,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:44,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 65 [2021-07-13 20:43:44,191 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:44,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:43:44,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 63 [2021-07-13 20:43:44,273 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:44,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:44,341 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-13 20:43:44,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 49 [2021-07-13 20:43:44,345 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:44,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:43:44,411 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-07-13 20:43:44,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 61 [2021-07-13 20:43:44,431 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 20:43:45,469 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 377 DAG size of output: 294 [2021-07-13 20:43:45,470 INFO L628 ElimStorePlain]: treesize reduction 250, result has 78.3 percent of original size [2021-07-13 20:43:45,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 36 dim-0 vars, 2 dim-1 vars, End of recursive call: and 20 xjuncts. [2021-07-13 20:43:45,551 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 38 variables, input treesize:1193, output treesize:1265 [2021-07-13 20:43:46,152 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2021-07-13 20:43:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:46,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554067116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:46,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:46,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-07-13 20:43:46,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904825926] [2021-07-13 20:43:46,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:43:46,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:46,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:43:46,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:43:46,243 INFO L87 Difference]: Start difference. First operand 49681 states and 192603 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:47,455 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-13 20:43:47,809 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2021-07-13 20:43:47,964 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-07-13 20:43:48,848 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 94 [2021-07-13 20:43:49,635 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 73 [2021-07-13 20:43:49,945 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2021-07-13 20:43:50,898 WARN L205 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 91 [2021-07-13 20:43:51,593 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 141 [2021-07-13 20:43:51,874 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2021-07-13 20:43:52,047 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2021-07-13 20:43:52,241 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-07-13 20:43:53,207 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 105 [2021-07-13 20:43:53,492 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:43:54,205 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 97 [2021-07-13 20:43:54,601 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-07-13 20:43:55,761 WARN L205 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 102 [2021-07-13 20:43:56,509 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 140 [2021-07-13 20:43:57,337 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 152 [2021-07-13 20:43:57,657 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-07-13 20:43:58,640 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 94 [2021-07-13 20:43:59,389 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 144 [2021-07-13 20:44:00,207 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 148 [2021-07-13 20:44:00,948 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2021-07-13 20:44:01,473 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 111 [2021-07-13 20:44:01,699 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-07-13 20:44:01,946 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:44:02,956 WARN L205 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 116 [2021-07-13 20:44:03,808 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 143 [2021-07-13 20:44:04,905 WARN L205 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 147 [2021-07-13 20:44:05,350 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 96 [2021-07-13 20:44:05,920 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 122 [2021-07-13 20:44:06,217 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 81 [2021-07-13 20:44:06,784 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 115 [2021-07-13 20:44:08,087 WARN L205 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 137 [2021-07-13 20:44:09,192 WARN L205 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 140 [2021-07-13 20:44:09,958 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 140 [2021-07-13 20:44:10,794 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 132 [2021-07-13 20:44:11,661 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 141 [2021-07-13 20:44:12,006 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 31 [2021-07-13 20:44:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:12,310 INFO L93 Difference]: Finished difference Result 70546 states and 263970 transitions. [2021-07-13 20:44:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:44:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:44:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:12,560 INFO L225 Difference]: With dead ends: 70546 [2021-07-13 20:44:12,560 INFO L226 Difference]: Without dead ends: 70516 [2021-07-13 20:44:12,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 27304.7ms TimeCoverageRelationStatistics Valid=706, Invalid=5456, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:44:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70516 states. [2021-07-13 20:44:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70516 to 49693. [2021-07-13 20:44:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49693 states, 49692 states have (on average 3.8769419624889316) internal successors, (192653), 49692 states have internal predecessors, (192653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49693 states to 49693 states and 192653 transitions. [2021-07-13 20:44:14,183 INFO L78 Accepts]: Start accepts. Automaton has 49693 states and 192653 transitions. Word has length 30 [2021-07-13 20:44:14,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:14,183 INFO L482 AbstractCegarLoop]: Abstraction has 49693 states and 192653 transitions. [2021-07-13 20:44:14,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand 49693 states and 192653 transitions. [2021-07-13 20:44:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:44:14,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:14,273 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:14,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4574 [2021-07-13 20:44:14,490 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:14,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:14,490 INFO L82 PathProgramCache]: Analyzing trace with hash 26395198, now seen corresponding path program 178 times [2021-07-13 20:44:14,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:14,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940040202] [2021-07-13 20:44:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:14,945 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-07-13 20:44:15,126 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-13 20:44:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:15,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:15,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940040202] [2021-07-13 20:44:15,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940040202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:15,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364138754] [2021-07-13 20:44:15,443 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:15,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:15,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:44:15,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:16,533 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:44:16,951 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:44:17,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,163 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 47 treesize of output 25 [2021-07-13 20:44:17,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,178 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 [2021-07-13 20:44:17,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,193 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 [2021-07-13 20:44:17,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,209 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 [2021-07-13 20:44:17,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,225 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 47 treesize of output 25 [2021-07-13 20:44:17,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,243 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 51 treesize of output 25 [2021-07-13 20:44:17,244 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,269 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 47 treesize of output 25 [2021-07-13 20:44:17,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,286 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 45 treesize of output 25 [2021-07-13 20:44:17,287 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,303 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 43 treesize of output 22 [2021-07-13 20:44:17,303 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:44:17,319 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,335 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 46 treesize of output 19 [2021-07-13 20:44:17,336 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,352 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 44 treesize of output 22 [2021-07-13 20:44:17,353 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,370 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 47 treesize of output 25 [2021-07-13 20:44:17,371 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,387 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 51 treesize of output 22 [2021-07-13 20:44:17,388 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,404 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 51 treesize of output 22 [2021-07-13 20:44:17,405 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,419 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 42 treesize of output 22 [2021-07-13 20:44:17,420 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,437 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 48 treesize of output 22 [2021-07-13 20:44:17,437 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,453 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 42 treesize of output 22 [2021-07-13 20:44:17,454 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 25 [2021-07-13 20:44:17,471 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,506 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 43 treesize of output 22 [2021-07-13 20:44:17,506 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,522 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 42 treesize of output 22 [2021-07-13 20:44:17,523 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,539 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 [2021-07-13 20:44:17,540 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,555 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 42 treesize of output 22 [2021-07-13 20:44:17,556 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,572 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 42 treesize of output 22 [2021-07-13 20:44:17,573 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,590 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 51 treesize of output 25 [2021-07-13 20:44:17,590 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,606 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 44 treesize of output 16 [2021-07-13 20:44:17,608 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,623 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 47 treesize of output 25 [2021-07-13 20:44:17,624 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-13 20:44:17,642 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,658 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 51 treesize of output 25 [2021-07-13 20:44:17,659 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,682 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 56 treesize of output 25 [2021-07-13 20:44:17,682 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2021-07-13 20:44:17,700 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,717 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 52 treesize of output 28 [2021-07-13 20:44:17,718 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,734 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 47 treesize of output 25 [2021-07-13 20:44:17,735 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:44:17,752 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,768 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 40 treesize of output 22 [2021-07-13 20:44:17,769 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,785 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 38 treesize of output 16 [2021-07-13 20:44:17,786 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,803 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 45 treesize of output 25 [2021-07-13 20:44:17,805 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,822 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 51 treesize of output 25 [2021-07-13 20:44:17,823 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,840 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 51 treesize of output 25 [2021-07-13 20:44:17,841 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,857 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 22 [2021-07-13 20:44:17,858 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,875 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 51 treesize of output 25 [2021-07-13 20:44:17,876 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,893 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 56 treesize of output 22 [2021-07-13 20:44:17,894 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,911 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 42 treesize of output 22 [2021-07-13 20:44:17,912 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,940 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 50 treesize of output 28 [2021-07-13 20:44:17,951 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,968 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 37 treesize of output 19 [2021-07-13 20:44:17,969 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:44:17,984 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:17,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:17,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:17,997 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 50 treesize of output 28 [2021-07-13 20:44:17,998 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,010 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 33 treesize of output 16 [2021-07-13 20:44:18,011 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,024 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 [2021-07-13 20:44:18,025 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,040 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 42 treesize of output 22 [2021-07-13 20:44:18,041 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,054 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 42 treesize of output 22 [2021-07-13 20:44:18,054 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,067 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 47 treesize of output 25 [2021-07-13 20:44:18,067 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,079 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 44 treesize of output 19 [2021-07-13 20:44:18,080 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,093 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 47 treesize of output 25 [2021-07-13 20:44:18,093 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,105 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 33 treesize of output 16 [2021-07-13 20:44:18,106 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,117 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 [2021-07-13 20:44:18,118 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 [2021-07-13 20:44:18,131 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,143 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 47 treesize of output 25 [2021-07-13 20:44:18,143 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,154 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 39 treesize of output 19 [2021-07-13 20:44:18,155 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-07-13 20:44:18,166 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,176 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 38 treesize of output 16 [2021-07-13 20:44:18,178 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,187 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 42 treesize of output 22 [2021-07-13 20:44:18,188 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:44:18,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:44:18,193 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 22 [2021-07-13 20:44:18,194 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-07-13 20:44:18,273 INFO L628 ElimStorePlain]: treesize reduction 144, result has 34.2 percent of original size [2021-07-13 20:44:18,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:44:18,274 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3472, output treesize:51 [2021-07-13 20:44:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:18,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364138754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:18,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:18,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:44:18,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038415886] [2021-07-13 20:44:18,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:44:18,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:44:18,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:44:18,341 INFO L87 Difference]: Start difference. First operand 49693 states and 192653 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:18,579 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-07-13 20:44:19,225 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 46 [2021-07-13 20:44:19,747 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2021-07-13 20:44:20,052 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 72 [2021-07-13 20:44:20,703 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 85 [2021-07-13 20:44:20,865 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:44:21,401 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 104 [2021-07-13 20:44:22,057 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 99 [2021-07-13 20:44:22,539 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2021-07-13 20:44:23,108 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 86 [2021-07-13 20:44:23,300 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-07-13 20:44:24,030 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-07-13 20:44:24,687 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 98 Received shutdown request... [2021-07-13 20:44:24,994 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-07-13 20:44:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:44:25,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4715 [2021-07-13 20:44:25,195 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:44:25,197 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:44:25,198 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:44:25,198 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:44:25 BasicIcfg [2021-07-13 20:44:25,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:44:25,199 INFO L168 Benchmark]: Toolchain (without parser) took 869330.25 ms. Allocated memory was 220.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 200.0 MB in the beginning and 5.7 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-07-13 20:44:25,199 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 220.2 MB. Free memory is still 201.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:44:25,199 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.81 ms. Allocated memory is still 220.2 MB. Free memory was 199.9 MB in the beginning and 198.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:44:25,199 INFO L168 Benchmark]: Boogie Preprocessor took 19.60 ms. Allocated memory is still 220.2 MB. Free memory was 198.5 MB in the beginning and 197.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:44:25,199 INFO L168 Benchmark]: RCFGBuilder took 253.49 ms. Allocated memory is still 220.2 MB. Free memory was 197.4 MB in the beginning and 184.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:44:25,199 INFO L168 Benchmark]: TraceAbstraction took 869028.11 ms. Allocated memory was 220.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 184.0 MB in the beginning and 5.7 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-07-13 20:44:25,199 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 220.2 MB. Free memory is still 201.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.81 ms. Allocated memory is still 220.2 MB. Free memory was 199.9 MB in the beginning and 198.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.60 ms. Allocated memory is still 220.2 MB. Free memory was 198.5 MB in the beginning and 197.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 253.49 ms. Allocated memory is still 220.2 MB. Free memory was 197.4 MB in the beginning and 184.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 869028.11 ms. Allocated memory was 220.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 184.0 MB in the beginning and 5.7 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (49693states) and FLOYD_HOARE automaton (currently 37 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 130 for 155ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 868922.9ms, OverallIterations: 263, TraceHistogramMax: 3, EmptinessCheckTime: 7820.7ms, AutomataDifference: 448955.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11723 SDtfs, 74982 SDslu, 90365 SDs, 0 SdLazy, 145324 SolverSat, 13590 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81924.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16946 GetRequests, 5536 SyntacticMatches, 248 SemanticMatches, 11161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188637 ImplicationChecksByTransitivity, 391901.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55127occurred in iteration=253, InterpolantAutomatonStates: 9852, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 124717.8ms AutomataMinimizationTime, 262 MinimizatonAttempts, 1373263 StatesRemovedByMinimization, 262 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 785.3ms SsaConstructionTime, 2794.7ms SatisfiabilityAnalysisTime, 221283.3ms InterpolantComputationTime, 13986 NumberOfCodeBlocks, 13986 NumberOfCodeBlocksAsserted, 908 NumberOfCheckSat, 13463 ConstructedInterpolants, 189 QuantifiedInterpolants, 286880 SizeOfPredicates, 1167 NumberOfNonLiveVariables, 18190 ConjunctsInSsa, 3961 ConjunctsInUnsatCore, 523 InterpolantComputations, 3 PerfectInterpolantSequences, 1026/4462 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown