/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:46:19,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:46:19,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:46:19,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:46:19,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:46:19,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:46:19,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:46:19,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:46:19,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:46:19,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:46:19,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:46:19,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:46:19,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:46:19,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:46:19,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:46:19,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:46:19,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:46:19,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:46:19,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:46:19,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:46:19,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:46:19,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:46:19,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:46:19,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:46:19,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:46:19,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:46:19,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:46:19,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:46:19,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:46:19,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:46:19,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:46:19,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:46:19,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:46:19,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:46:19,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:46:19,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:46:19,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:46:19,524 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:46:19,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:46:19,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:46:19,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:46:19,526 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:46:19,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:46:19,526 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:46:19,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:46:19,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:46:19,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:46:19,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:46:19,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:46:19,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:46:19,528 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:46:19,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:46:19,528 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:46:19,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:46:19,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:46:19,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:46:19,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:46:19,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:46:19,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:46:19,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:46:19,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:46:19,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:46:19,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:46:19,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:46:19,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:46:19,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:46:19,825 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:46:19,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:46:19,851 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:46:19,853 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:46:19,854 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:46:19,854 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2019-11-06 18:46:19,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15961b21c/2a23177b03534db7968b4acf4f510a9c/FLAG308c09d30 [2019-11-06 18:46:20,399 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:46:20,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i [2019-11-06 18:46:20,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15961b21c/2a23177b03534db7968b4acf4f510a9c/FLAG308c09d30 [2019-11-06 18:46:20,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15961b21c/2a23177b03534db7968b4acf4f510a9c [2019-11-06 18:46:20,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:46:20,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:46:20,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:46:20,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:46:20,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:46:20,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:46:20" (1/1) ... [2019-11-06 18:46:20,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d85055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:20, skipping insertion in model container [2019-11-06 18:46:20,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:46:20" (1/1) ... [2019-11-06 18:46:20,805 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:46:20,824 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:46:21,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:46:21,038 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:46:21,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:46:21,074 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:46:21,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21 WrapperNode [2019-11-06 18:46:21,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:46:21,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:46:21,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:46:21,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:46:21,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21" (1/1) ... [2019-11-06 18:46:21,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21" (1/1) ... [2019-11-06 18:46:21,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21" (1/1) ... [2019-11-06 18:46:21,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21" (1/1) ... [2019-11-06 18:46:21,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21" (1/1) ... [2019-11-06 18:46:21,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21" (1/1) ... [2019-11-06 18:46:21,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21" (1/1) ... [2019-11-06 18:46:21,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:46:21,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:46:21,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:46:21,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:46:21,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21" (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 [2019-11-06 18:46:21,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:46:21,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:46:21,241 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:46:21,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:46:21,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:46:21,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:46:21,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:46:21,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:46:21,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:46:21,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:46:21,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:46:21,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:46:21,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:46:21,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:46:21,533 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:46:21,534 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:46:21,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:46:21 BoogieIcfgContainer [2019-11-06 18:46:21,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:46:21,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:46:21,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:46:21,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:46:21,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:46:20" (1/3) ... [2019-11-06 18:46:21,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f54b3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:46:21, skipping insertion in model container [2019-11-06 18:46:21,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:46:21" (2/3) ... [2019-11-06 18:46:21,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f54b3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:46:21, skipping insertion in model container [2019-11-06 18:46:21,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:46:21" (3/3) ... [2019-11-06 18:46:21,559 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2019-11-06 18:46:21,580 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:46:21,598 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:46:21,613 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:46:21,636 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:46:21,636 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:46:21,636 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:46:21,636 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:46:21,636 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:46:21,636 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:46:21,636 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:46:21,636 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:46:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-06 18:46:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:46:21,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:21,658 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:21,659 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash -766370701, now seen corresponding path program 1 times [2019-11-06 18:46:21,672 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:21,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178212549] [2019-11-06 18:46:21,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:46:21,845 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178212549] [2019-11-06 18:46:21,846 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:46:21,846 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:46:21,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347551682] [2019-11-06 18:46:21,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:46:21,854 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:46:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:46:21,869 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-11-06 18:46:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:21,982 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2019-11-06 18:46:21,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:46:21,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:46:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:21,992 INFO L225 Difference]: With dead ends: 56 [2019-11-06 18:46:21,992 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 18:46:21,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:46:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 18:46:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-06 18:46:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:46:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2019-11-06 18:46:22,030 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15 [2019-11-06 18:46:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:22,031 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2019-11-06 18:46:22,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:46:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2019-11-06 18:46:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:46:22,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:22,032 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:22,033 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:22,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:22,033 INFO L82 PathProgramCache]: Analyzing trace with hash 288109956, now seen corresponding path program 1 times [2019-11-06 18:46:22,034 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:22,034 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704127054] [2019-11-06 18:46:22,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:46:22,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704127054] [2019-11-06 18:46:22,098 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:46:22,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:46:22,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160411691] [2019-11-06 18:46:22,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:46:22,101 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:22,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:46:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:22,102 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 4 states. [2019-11-06 18:46:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:22,208 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2019-11-06 18:46:22,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:46:22,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:46:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:22,211 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:46:22,211 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:46:22,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:46:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:46:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-11-06 18:46:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:46:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-06 18:46:22,220 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2019-11-06 18:46:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:22,221 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-06 18:46:22,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:46:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-06 18:46:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:46:22,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:22,222 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:22,223 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1452110141, now seen corresponding path program 1 times [2019-11-06 18:46:22,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:22,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018161852] [2019-11-06 18:46:22,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:46:22,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018161852] [2019-11-06 18:46:22,363 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:46:22,363 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:46:22,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441380137] [2019-11-06 18:46:22,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:46:22,364 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:46:22,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:46:22,365 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2019-11-06 18:46:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:22,494 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2019-11-06 18:46:22,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:46:22,495 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-06 18:46:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:22,496 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:46:22,496 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:46:22,497 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:46:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:46:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-06 18:46:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:46:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-11-06 18:46:22,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 27 [2019-11-06 18:46:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:22,505 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-11-06 18:46:22,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:46:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-11-06 18:46:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:46:22,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:22,506 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:22,507 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:22,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1877196419, now seen corresponding path program 1 times [2019-11-06 18:46:22,508 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:22,508 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027228041] [2019-11-06 18:46:22,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:46:22,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027228041] [2019-11-06 18:46:22,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663851647] [2019-11-06 18:46:22,592 INFO L94 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 [2019-11-06 18:46:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:22,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:46:22,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:46:22,737 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:22,737 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:46:22,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007238559] [2019-11-06 18:46:22,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:46:22,741 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:22,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:46:22,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:46:22,742 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 6 states. [2019-11-06 18:46:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:22,877 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2019-11-06 18:46:22,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:46:22,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-06 18:46:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:22,879 INFO L225 Difference]: With dead ends: 84 [2019-11-06 18:46:22,879 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:46:22,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:46:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:46:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2019-11-06 18:46:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:46:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2019-11-06 18:46:22,894 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 27 [2019-11-06 18:46:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:22,895 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2019-11-06 18:46:22,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:46:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2019-11-06 18:46:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:46:22,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:22,899 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:23,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:23,108 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1355439264, now seen corresponding path program 2 times [2019-11-06 18:46:23,109 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:23,109 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934624667] [2019-11-06 18:46:23,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:46:23,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934624667] [2019-11-06 18:46:23,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017222661] [2019-11-06 18:46:23,239 INFO L92 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 [2019-11-06 18:46:23,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:46:23,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:23,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:46:23,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:46:23,321 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:23,321 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:46:23,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811792140] [2019-11-06 18:46:23,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:46:23,323 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:23,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:46:23,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:46:23,323 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 7 states. [2019-11-06 18:46:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:23,483 INFO L93 Difference]: Finished difference Result 114 states and 156 transitions. [2019-11-06 18:46:23,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:46:23,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2019-11-06 18:46:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:23,485 INFO L225 Difference]: With dead ends: 114 [2019-11-06 18:46:23,485 INFO L226 Difference]: Without dead ends: 77 [2019-11-06 18:46:23,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:46:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-06 18:46:23,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2019-11-06 18:46:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:46:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2019-11-06 18:46:23,500 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 39 [2019-11-06 18:46:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:23,500 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2019-11-06 18:46:23,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:46:23,500 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2019-11-06 18:46:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:46:23,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:23,502 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:23,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:23,712 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:23,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1296674585, now seen corresponding path program 3 times [2019-11-06 18:46:23,713 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:23,713 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353517105] [2019-11-06 18:46:23,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:46:23,810 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353517105] [2019-11-06 18:46:23,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644871545] [2019-11-06 18:46:23,811 INFO L92 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 [2019-11-06 18:46:23,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:46:23,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:23,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:46:23,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:23,954 INFO L375 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 10 treesize of output 8 [2019-11-06 18:46:23,955 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:23,964 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:23,964 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:23,965 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-06 18:46:24,024 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2019-11-06 18:46:24,025 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:24,045 INFO L567 ElimStorePlain]: treesize reduction 4, result has 87.9 percent of original size [2019-11-06 18:46:24,046 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:46:24,047 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:29 [2019-11-06 18:46:24,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:24,288 INFO L341 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2019-11-06 18:46:24,288 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 43 [2019-11-06 18:46:24,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:24,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:24,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:24,305 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:24,345 INFO L567 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2019-11-06 18:46:24,347 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-06 18:46:24,347 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:17 [2019-11-06 18:46:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-06 18:46:24,460 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:24,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2019-11-06 18:46:24,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686439634] [2019-11-06 18:46:24,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:46:24,464 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:24,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:46:24,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:46:24,466 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 16 states. [2019-11-06 18:46:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:26,206 INFO L93 Difference]: Finished difference Result 248 states and 357 transitions. [2019-11-06 18:46:26,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-06 18:46:26,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-11-06 18:46:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:26,212 INFO L225 Difference]: With dead ends: 248 [2019-11-06 18:46:26,212 INFO L226 Difference]: Without dead ends: 197 [2019-11-06 18:46:26,214 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 18:46:26,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-06 18:46:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 178. [2019-11-06 18:46:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-06 18:46:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 247 transitions. [2019-11-06 18:46:26,235 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 247 transitions. Word has length 51 [2019-11-06 18:46:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:26,235 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 247 transitions. [2019-11-06 18:46:26,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:46:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 247 transitions. [2019-11-06 18:46:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 18:46:26,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:26,239 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:26,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:26,443 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1040797544, now seen corresponding path program 1 times [2019-11-06 18:46:26,444 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:26,444 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322674487] [2019-11-06 18:46:26,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-06 18:46:26,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322674487] [2019-11-06 18:46:26,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951919871] [2019-11-06 18:46:26,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:46:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:26,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:46:26,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-06 18:46:26,716 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:26,716 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:46:26,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77169317] [2019-11-06 18:46:26,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:46:26,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:46:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:46:26,720 INFO L87 Difference]: Start difference. First operand 178 states and 247 transitions. Second operand 11 states. [2019-11-06 18:46:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:26,967 INFO L93 Difference]: Finished difference Result 399 states and 564 transitions. [2019-11-06 18:46:26,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:46:26,968 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2019-11-06 18:46:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:26,970 INFO L225 Difference]: With dead ends: 399 [2019-11-06 18:46:26,970 INFO L226 Difference]: Without dead ends: 240 [2019-11-06 18:46:26,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:46:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-11-06 18:46:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 205. [2019-11-06 18:46:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-11-06 18:46:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 285 transitions. [2019-11-06 18:46:26,994 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 285 transitions. Word has length 87 [2019-11-06 18:46:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:26,994 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 285 transitions. [2019-11-06 18:46:26,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:46:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 285 transitions. [2019-11-06 18:46:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 18:46:26,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:26,999 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:27,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:27,203 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash 370428881, now seen corresponding path program 2 times [2019-11-06 18:46:27,203 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:27,204 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628275057] [2019-11-06 18:46:27,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-06 18:46:27,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628275057] [2019-11-06 18:46:27,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166317255] [2019-11-06 18:46:27,381 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2019-11-06 18:46:27,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:46:27,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:27,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:46:27,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-06 18:46:27,486 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:27,487 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:46:27,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199609870] [2019-11-06 18:46:27,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:46:27,488 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:46:27,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:46:27,489 INFO L87 Difference]: Start difference. First operand 205 states and 285 transitions. Second operand 12 states. [2019-11-06 18:46:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:27,725 INFO L93 Difference]: Finished difference Result 451 states and 638 transitions. [2019-11-06 18:46:27,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:46:27,726 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 99 [2019-11-06 18:46:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:27,728 INFO L225 Difference]: With dead ends: 451 [2019-11-06 18:46:27,728 INFO L226 Difference]: Without dead ends: 267 [2019-11-06 18:46:27,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:46:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-11-06 18:46:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 232. [2019-11-06 18:46:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-11-06 18:46:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 323 transitions. [2019-11-06 18:46:27,749 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 323 transitions. Word has length 99 [2019-11-06 18:46:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:27,749 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 323 transitions. [2019-11-06 18:46:27,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:46:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 323 transitions. [2019-11-06 18:46:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-06 18:46:27,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:27,753 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:27,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:27,965 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:27,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:27,965 INFO L82 PathProgramCache]: Analyzing trace with hash 855562356, now seen corresponding path program 3 times [2019-11-06 18:46:27,966 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:27,966 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397902867] [2019-11-06 18:46:27,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2019-11-06 18:46:28,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397902867] [2019-11-06 18:46:28,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639159987] [2019-11-06 18:46:28,141 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:46:28,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:46:28,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:28,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 18:46:28,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:28,230 INFO L375 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 10 treesize of output 8 [2019-11-06 18:46:28,231 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:28,236 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:28,236 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:28,237 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-06 18:46:28,289 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2019-11-06 18:46:28,290 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:28,301 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:28,302 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:46:28,302 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-06 18:46:28,394 INFO L341 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-06 18:46:28,395 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2019-11-06 18:46:28,396 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:28,407 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:46:28,408 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-06 18:46:28,408 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2019-11-06 18:46:31,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:31,190 INFO L341 Elim1Store]: treesize reduction 18, result has 43.8 percent of original size [2019-11-06 18:46:31,191 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 58 treesize of output 41 [2019-11-06 18:46:31,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:46:31,192 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:46:31,222 INFO L567 ElimStorePlain]: treesize reduction 2, result has 92.0 percent of original size [2019-11-06 18:46:31,223 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-06 18:46:31,223 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:8 [2019-11-06 18:46:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 25 proven. 91 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2019-11-06 18:46:31,432 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:31,432 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2019-11-06 18:46:31,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547573179] [2019-11-06 18:46:31,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:46:31,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:46:31,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=460, Unknown=1, NotChecked=0, Total=600 [2019-11-06 18:46:31,434 INFO L87 Difference]: Start difference. First operand 232 states and 323 transitions. Second operand 25 states.