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-crafted/bAnd2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:41:12,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:41:12,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:41:12,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:41:12,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:41:12,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:41:12,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:41:12,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:41:12,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:41:12,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:41:12,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:41:12,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:41:12,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:41:12,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:41:12,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:41:12,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:41:12,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:41:12,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:41:12,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:41:12,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:41:12,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:41:12,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:41:12,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:41:12,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:41:12,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:41:12,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:41:12,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:41:12,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:41:12,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:41:12,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:41:12,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:41:12,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:41:12,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:41:12,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:41:12,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:41:12,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:41:12,701 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 [2019-10-13 17:41:12,729 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:41:12,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:41:12,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:41:12,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:41:12,731 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:41:12,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:41:12,731 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:41:12,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:41:12,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:41:12,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:41:12,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:41:12,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:41:12,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:41:12,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:41:12,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:41:12,737 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:41:12,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:41:12,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:41:12,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:41:12,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:41:12,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:41:12,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:41:12,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:41:12,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:41:12,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:41:12,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:41:12,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:41:12,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:41:12,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:41:13,040 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:41:13,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:41:13,059 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:41:13,060 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:41:13,061 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:41:13,062 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd2.i [2019-10-13 17:41:13,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cd5347b5/630c28d420ae4f91bac1f49a32f823fb/FLAGb922dbced [2019-10-13 17:41:13,608 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:41:13,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd2.i [2019-10-13 17:41:13,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cd5347b5/630c28d420ae4f91bac1f49a32f823fb/FLAGb922dbced [2019-10-13 17:41:13,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cd5347b5/630c28d420ae4f91bac1f49a32f823fb [2019-10-13 17:41:13,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:41:13,966 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:41:13,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:13,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:41:13,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:41:13,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:13" (1/1) ... [2019-10-13 17:41:13,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2150d71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:13, skipping insertion in model container [2019-10-13 17:41:13,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:13" (1/1) ... [2019-10-13 17:41:13,985 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:41:14,002 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:41:14,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,233 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:41:14,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,401 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:41:14,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14 WrapperNode [2019-10-13 17:41:14,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:14,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:41:14,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:41:14,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:41:14,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:41:14,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:41:14,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:41:14,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:41:14,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:41:14,543 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2019-10-13 17:41:14,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:41:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:41:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:41:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2019-10-13 17:41:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:41:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:41:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:41:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:41:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:41:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:41:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:41:14,869 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:41:14,869 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:41:14,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:14 BoogieIcfgContainer [2019-10-13 17:41:14,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:41:14,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:41:14,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:41:14,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:41:14,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:41:13" (1/3) ... [2019-10-13 17:41:14,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2caa6a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:14, skipping insertion in model container [2019-10-13 17:41:14,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (2/3) ... [2019-10-13 17:41:14,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2caa6a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:14, skipping insertion in model container [2019-10-13 17:41:14,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:14" (3/3) ... [2019-10-13 17:41:14,879 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd2.i [2019-10-13 17:41:14,892 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:41:14,900 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:41:14,912 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:41:14,936 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:41:14,937 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:41:14,937 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:41:14,937 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:41:14,937 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:41:14,937 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:41:14,937 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:41:14,937 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:41:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-13 17:41:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:41:14,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:14,967 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:14,969 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:14,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:14,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-10-13 17:41:14,982 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:14,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315113178] [2019-10-13 17:41:14,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:14,983 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:14,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315113178] [2019-10-13 17:41:15,208 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:41:15,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:41:15,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324358515] [2019-10-13 17:41:15,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:15,214 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:41:15,232 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-13 17:41:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,363 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-13 17:41:15,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:15,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 17:41:15,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,376 INFO L225 Difference]: With dead ends: 54 [2019-10-13 17:41:15,376 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:41:15,380 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:41:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:41:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 17:41:15,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:41:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-13 17:41:15,428 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-13 17:41:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,429 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-13 17:41:15,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-13 17:41:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:41:15,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,432 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:15,432 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-10-13 17:41:15,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221962059] [2019-10-13 17:41:15,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:41:15,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221962059] [2019-10-13 17:41:15,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398736464] [2019-10-13 17:41:15,578 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 [2019-10-13 17:41:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:15,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,701 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:15,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:41:15,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810581890] [2019-10-13 17:41:15,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:15,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:41:15,705 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-13 17:41:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,722 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-13 17:41:15,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:15,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 17:41:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,726 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:41:15,726 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:41:15,728 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:41:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:41:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 17:41:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:41:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-13 17:41:15,743 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-13 17:41:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,743 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-13 17:41:15,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-13 17:41:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:41:15,745 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,746 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:15,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:15,952 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-10-13 17:41:15,954 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,954 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083856379] [2019-10-13 17:41:15,955 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,955 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:41:16,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083856379] [2019-10-13 17:41:16,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587628527] [2019-10-13 17:41:16,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:41:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:41:16,200 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:16,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-13 17:41:16,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193893663] [2019-10-13 17:41:16,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:16,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:16,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:41:16,203 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-13 17:41:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:16,222 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-13 17:41:16,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:16,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-13 17:41:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:16,224 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:41:16,225 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:41:16,226 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:41:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:41:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 17:41:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:41:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-13 17:41:16,239 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-13 17:41:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:16,239 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-13 17:41:16,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-13 17:41:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:41:16,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:16,243 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:16,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,457 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-10-13 17:41:16,458 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:16,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083202337] [2019-10-13 17:41:16,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:41:16,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083202337] [2019-10-13 17:41:16,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261026004] [2019-10-13 17:41:16,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:41:16,691 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:16,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:41:16,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667525978] [2019-10-13 17:41:16,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:16,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:16,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:16,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:16,693 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-13 17:41:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:16,708 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-13 17:41:16,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:16,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-13 17:41:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:16,710 INFO L225 Difference]: With dead ends: 43 [2019-10-13 17:41:16,710 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 17:41:16,710 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 17:41:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 17:41:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:41:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-13 17:41:16,716 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-13 17:41:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:16,718 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-13 17:41:16,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:16,718 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-13 17:41:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:41:16,719 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:16,720 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:16,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,923 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-10-13 17:41:16,925 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:16,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003259370] [2019-10-13 17:41:16,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:41:17,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003259370] [2019-10-13 17:41:17,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460654978] [2019-10-13 17:41:17,051 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 [2019-10-13 17:41:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:41:17,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 17:41:17,137 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:17,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-13 17:41:17,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024287009] [2019-10-13 17:41:17,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:41:17,141 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:17,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:41:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:41:17,142 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-13 17:41:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:17,290 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-13 17:41:17,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:41:17,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-13 17:41:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:17,292 INFO L225 Difference]: With dead ends: 55 [2019-10-13 17:41:17,292 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:41:17,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:41:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:41:17,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-13 17:41:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:41:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-13 17:41:17,301 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-13 17:41:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:17,302 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-13 17:41:17,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:41:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-13 17:41:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:41:17,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:17,304 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:17,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,509 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:17,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:17,510 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-10-13 17:41:17,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:17,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836343205] [2019-10-13 17:41:17,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:17,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836343205] [2019-10-13 17:41:17,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593422881] [2019-10-13 17:41:17,607 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 [2019-10-13 17:41:17,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:17,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:17,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:17,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:17,704 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:17,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:41:17,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275916767] [2019-10-13 17:41:17,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:41:17,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:17,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:41:17,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:17,710 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-13 17:41:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:17,797 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-13 17:41:17,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:41:17,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-13 17:41:17,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:17,799 INFO L225 Difference]: With dead ends: 58 [2019-10-13 17:41:17,799 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 17:41:17,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:17,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 17:41:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-13 17:41:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 17:41:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-13 17:41:17,813 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-13 17:41:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:17,813 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-13 17:41:17,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:41:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-13 17:41:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:41:17,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:17,818 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:18,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,030 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:18,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:18,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-10-13 17:41:18,031 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:18,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605771838] [2019-10-13 17:41:18,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:18,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605771838] [2019-10-13 17:41:18,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85719422] [2019-10-13 17:41:18,196 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 [2019-10-13 17:41:18,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:41:18,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:18,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:41:18,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 17:41:18,332 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:18,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 17:41:18,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691498442] [2019-10-13 17:41:18,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:41:18,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:41:18,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,334 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-13 17:41:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:18,474 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-13 17:41:18,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:41:18,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-13 17:41:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:18,476 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:41:18,476 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 17:41:18,476 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 17:41:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-13 17:41:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 17:41:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-13 17:41:18,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-13 17:41:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:18,488 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-13 17:41:18,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:41:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-13 17:41:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:41:18,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:18,493 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:18,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,695 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-10-13 17:41:18,696 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:18,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567342715] [2019-10-13 17:41:18,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:18,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567342715] [2019-10-13 17:41:18,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805160538] [2019-10-13 17:41:18,808 INFO L92 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 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 [2019-10-13 17:41:18,868 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:18,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:18,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:18,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:18,898 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:18,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:41:18,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121208312] [2019-10-13 17:41:18,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:41:18,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:18,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:41:18,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,900 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-13 17:41:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:18,991 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-13 17:41:18,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:41:18,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-13 17:41:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:18,993 INFO L225 Difference]: With dead ends: 66 [2019-10-13 17:41:18,993 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:41:18,993 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:41:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-13 17:41:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:41:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-13 17:41:18,999 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-13 17:41:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:19,000 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-13 17:41:19,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:41:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-13 17:41:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:41:19,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:19,001 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:19,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,212 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-10-13 17:41:19,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:19,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771963025] [2019-10-13 17:41:19,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:19,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771963025] [2019-10-13 17:41:19,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565410998] [2019-10-13 17:41:19,321 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,408 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:41:19,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:19,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:19,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:41:19,470 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:19,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:41:19,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29645412] [2019-10-13 17:41:19,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:41:19,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:19,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:41:19,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:19,472 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-13 17:41:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:19,635 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-13 17:41:19,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:41:19,635 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-13 17:41:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:19,636 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:41:19,636 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 17:41:19,637 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:41:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 17:41:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-13 17:41:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:41:19,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-13 17:41:19,645 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-13 17:41:19,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:19,645 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-13 17:41:19,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:41:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-13 17:41:19,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 17:41:19,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:19,650 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:19,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,850 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:19,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-10-13 17:41:19,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:19,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139093890] [2019-10-13 17:41:19,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-13 17:41:19,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139093890] [2019-10-13 17:41:19,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280615908] [2019-10-13 17:41:19,990 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-13 17:41:20,072 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:41:20,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:20,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:41:20,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-13 17:41:20,156 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:20,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-13 17:41:20,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393478514] [2019-10-13 17:41:20,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:41:20,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:20,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:41:20,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:41:20,161 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-13 17:41:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:20,371 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-13 17:41:20,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:41:20,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-13 17:41:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:20,372 INFO L225 Difference]: With dead ends: 77 [2019-10-13 17:41:20,372 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 17:41:20,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 17:41:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-13 17:41:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:41:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-13 17:41:20,379 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-13 17:41:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:20,380 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-13 17:41:20,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:41:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-13 17:41:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 17:41:20,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:20,381 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:20,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:20,587 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-10-13 17:41:20,588 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:20,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473003015] [2019-10-13 17:41:20,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:20,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473003015] [2019-10-13 17:41:20,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708523651] [2019-10-13 17:41:20,796 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-13 17:41:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:20,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:20,870 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:20,870 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:41:20,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698524274] [2019-10-13 17:41:20,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:41:20,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:41:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:20,872 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-13 17:41:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:20,984 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-13 17:41:20,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:41:20,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-13 17:41:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:20,986 INFO L225 Difference]: With dead ends: 80 [2019-10-13 17:41:20,986 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 17:41:20,987 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 17:41:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-13 17:41:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:41:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-13 17:41:20,993 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-13 17:41:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:20,994 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-13 17:41:20,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:41:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-13 17:41:20,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-13 17:41:20,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:20,995 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:21,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:21,208 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:21,208 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-10-13 17:41:21,209 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:21,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510259932] [2019-10-13 17:41:21,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510259932] [2019-10-13 17:41:21,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548157715] [2019-10-13 17:41:21,329 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 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 [2019-10-13 17:41:21,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:21,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:21,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:41:21,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,424 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:21,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:41:21,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363170530] [2019-10-13 17:41:21,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:41:21,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:21,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:41:21,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:41:21,426 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-13 17:41:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:21,529 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-13 17:41:21,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:41:21,530 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-13 17:41:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:21,531 INFO L225 Difference]: With dead ends: 82 [2019-10-13 17:41:21,531 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:41:21,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:41:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:41:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-13 17:41:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:41:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-13 17:41:21,538 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-13 17:41:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:21,539 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-13 17:41:21,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:41:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-13 17:41:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:41:21,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:21,540 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:21,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:21,753 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:21,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-10-13 17:41:21,754 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:21,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219481945] [2019-10-13 17:41:21,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219481945] [2019-10-13 17:41:21,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532234306] [2019-10-13 17:41:21,909 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 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 [2019-10-13 17:41:21,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:41:21,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:21,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:21,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-13 17:41:22,006 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:22,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-13 17:41:22,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535903055] [2019-10-13 17:41:22,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:41:22,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:22,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:41:22,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:41:22,008 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-13 17:41:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:22,178 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-13 17:41:22,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:41:22,178 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-13 17:41:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:22,179 INFO L225 Difference]: With dead ends: 87 [2019-10-13 17:41:22,179 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 17:41:22,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:41:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 17:41:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-13 17:41:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:41:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-13 17:41:22,186 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-13 17:41:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:22,187 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-13 17:41:22,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:41:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-13 17:41:22,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 17:41:22,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:22,188 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:22,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:22,393 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-10-13 17:41:22,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:22,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556384605] [2019-10-13 17:41:22,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-13 17:41:22,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556384605] [2019-10-13 17:41:22,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441477681] [2019-10-13 17:41:22,559 INFO L92 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 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 [2019-10-13 17:41:22,645 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:22,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:22,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:22,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-13 17:41:22,742 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:22,743 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-13 17:41:22,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838891095] [2019-10-13 17:41:22,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:41:22,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:41:22,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:22,746 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-13 17:41:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:23,019 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-13 17:41:23,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:41:23,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-13 17:41:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:23,020 INFO L225 Difference]: With dead ends: 93 [2019-10-13 17:41:23,020 INFO L226 Difference]: Without dead ends: 63 [2019-10-13 17:41:23,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-13 17:41:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-13 17:41:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:41:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-13 17:41:23,030 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-13 17:41:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:23,030 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-13 17:41:23,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:41:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-13 17:41:23,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 17:41:23,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:23,031 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:23,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:23,236 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-10-13 17:41:23,236 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:23,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375902293] [2019-10-13 17:41:23,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:23,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:23,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-13 17:41:23,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375902293] [2019-10-13 17:41:23,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310099541] [2019-10-13 17:41:23,392 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:23,672 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 17:41:23,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:23,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:41:23,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-13 17:41:23,765 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:23,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-13 17:41:23,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981802753] [2019-10-13 17:41:23,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:41:23,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:23,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:41:23,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:23,768 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-13 17:41:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:24,024 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-13 17:41:24,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:41:24,024 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-13 17:41:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:24,025 INFO L225 Difference]: With dead ends: 99 [2019-10-13 17:41:24,025 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:41:24,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:41:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:41:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-13 17:41:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:41:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-13 17:41:24,032 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-13 17:41:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:24,032 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-13 17:41:24,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:41:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-13 17:41:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:41:24,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:24,034 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:24,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:24,235 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:24,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-10-13 17:41:24,236 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:24,236 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070328309] [2019-10-13 17:41:24,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-13 17:41:24,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070328309] [2019-10-13 17:41:24,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272558545] [2019-10-13 17:41:24,471 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-13 17:41:24,612 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 17:41:24,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:24,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:41:24,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-13 17:41:24,680 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:24,681 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-13 17:41:24,681 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739002392] [2019-10-13 17:41:24,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:41:24,682 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:24,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:41:24,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:41:24,683 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-13 17:41:24,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:24,856 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-13 17:41:24,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:41:24,856 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-13 17:41:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:24,857 INFO L225 Difference]: With dead ends: 105 [2019-10-13 17:41:24,858 INFO L226 Difference]: Without dead ends: 71 [2019-10-13 17:41:24,859 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:41:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-13 17:41:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-13 17:41:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-13 17:41:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-13 17:41:24,865 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-13 17:41:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:24,866 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-13 17:41:24,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:41:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-13 17:41:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:41:24,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:24,867 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:25,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:25,071 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-10-13 17:41:25,072 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:25,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788965385] [2019-10-13 17:41:25,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788965385] [2019-10-13 17:41:25,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541491452] [2019-10-13 17:41:25,246 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-13 17:41:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:41:25,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,359 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:25,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:41:25,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404092919] [2019-10-13 17:41:25,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:41:25,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:41:25,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:25,361 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-13 17:41:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:25,463 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-13 17:41:25,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:41:25,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-13 17:41:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:25,465 INFO L225 Difference]: With dead ends: 108 [2019-10-13 17:41:25,465 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 17:41:25,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 17:41:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-13 17:41:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 17:41:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-13 17:41:25,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-13 17:41:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:25,472 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-13 17:41:25,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:41:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-13 17:41:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-13 17:41:25,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:25,474 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:25,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:25,678 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-10-13 17:41:25,678 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:25,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045920333] [2019-10-13 17:41:25,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045920333] [2019-10-13 17:41:25,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645629442] [2019-10-13 17:41:25,863 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 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 [2019-10-13 17:41:25,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:25,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:25,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:41:25,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:25,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:41:25,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143681080] [2019-10-13 17:41:25,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:41:25,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:41:25,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:25,983 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-13 17:41:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:26,102 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-13 17:41:26,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:41:26,103 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-13 17:41:26,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:26,104 INFO L225 Difference]: With dead ends: 110 [2019-10-13 17:41:26,104 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:41:26,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:26,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:41:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-13 17:41:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:41:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-13 17:41:26,116 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-13 17:41:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:26,116 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-13 17:41:26,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:41:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-13 17:41:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 17:41:26,118 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:26,118 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:26,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:26,328 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-10-13 17:41:26,329 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:26,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832194641] [2019-10-13 17:41:26,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:26,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832194641] [2019-10-13 17:41:26,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424756072] [2019-10-13 17:41:26,571 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 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 [2019-10-13 17:41:26,661 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:41:26,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:26,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:26,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-13 17:41:26,746 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:26,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-13 17:41:26,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615824184] [2019-10-13 17:41:26,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:41:26,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:41:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:26,748 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-13 17:41:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:26,935 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-13 17:41:26,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:41:26,936 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-13 17:41:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:26,937 INFO L225 Difference]: With dead ends: 115 [2019-10-13 17:41:26,937 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 17:41:26,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 17:41:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-13 17:41:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:41:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-13 17:41:26,944 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-13 17:41:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:26,945 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-13 17:41:26,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:41:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-13 17:41:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 17:41:26,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:26,946 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:27,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:27,151 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-10-13 17:41:27,151 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:27,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416409195] [2019-10-13 17:41:27,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416409195] [2019-10-13 17:41:27,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526155604] [2019-10-13 17:41:27,349 INFO L92 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 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 [2019-10-13 17:41:27,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:27,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:27,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:41:27,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,486 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:27,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:41:27,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259382807] [2019-10-13 17:41:27,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:41:27,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:41:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:27,488 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-13 17:41:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:27,665 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-13 17:41:27,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:41:27,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-13 17:41:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:27,667 INFO L225 Difference]: With dead ends: 118 [2019-10-13 17:41:27,667 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 17:41:27,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 17:41:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-13 17:41:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 17:41:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-13 17:41:27,673 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-13 17:41:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:27,673 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-13 17:41:27,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:41:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-13 17:41:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 17:41:27,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:27,675 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:27,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:27,879 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:27,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:27,879 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-10-13 17:41:27,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:27,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371250758] [2019-10-13 17:41:27,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:28,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371250758] [2019-10-13 17:41:28,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614877017] [2019-10-13 17:41:28,178 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:28,988 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-13 17:41:28,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:28,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:41:28,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-13 17:41:29,101 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:29,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-13 17:41:29,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451234915] [2019-10-13 17:41:29,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:41:29,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:29,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:41:29,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:29,103 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-13 17:41:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:29,470 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-13 17:41:29,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 17:41:29,471 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-13 17:41:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:29,472 INFO L225 Difference]: With dead ends: 123 [2019-10-13 17:41:29,472 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 17:41:29,473 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:41:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 17:41:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-13 17:41:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 17:41:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-13 17:41:29,478 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-13 17:41:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:29,479 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-13 17:41:29,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:41:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-13 17:41:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 17:41:29,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:29,480 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:29,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:29,686 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:29,686 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-10-13 17:41:29,686 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:29,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771465802] [2019-10-13 17:41:29,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:29,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:29,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-13 17:41:29,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771465802] [2019-10-13 17:41:29,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893048252] [2019-10-13 17:41:29,985 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-13 17:41:31,024 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:41:31,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:31,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:41:31,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 269 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-13 17:41:31,184 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:31,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-10-13 17:41:31,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661161630] [2019-10-13 17:41:31,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:41:31,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:31,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:41:31,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:41:31,186 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 30 states. [2019-10-13 17:41:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:31,613 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2019-10-13 17:41:31,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:41:31,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2019-10-13 17:41:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:31,616 INFO L225 Difference]: With dead ends: 130 [2019-10-13 17:41:31,616 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 17:41:31,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=336, Invalid=924, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:41:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 17:41:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-13 17:41:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 17:41:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-13 17:41:31,623 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 120 [2019-10-13 17:41:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:31,623 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-13 17:41:31,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:41:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-13 17:41:31,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 17:41:31,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:31,625 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:31,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:31,831 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 19 times [2019-10-13 17:41:31,832 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:31,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419643898] [2019-10-13 17:41:31,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419643898] [2019-10-13 17:41:32,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082111272] [2019-10-13 17:41:32,115 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-13 17:41:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:41:32,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,249 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:32,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:41:32,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712137212] [2019-10-13 17:41:32,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:41:32,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:32,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:41:32,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:41:32,257 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-13 17:41:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:32,373 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-13 17:41:32,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:41:32,373 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-13 17:41:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:32,374 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:41:32,375 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:41:32,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:41:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:41:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-13 17:41:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 17:41:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-13 17:41:32,380 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-13 17:41:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:32,380 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-13 17:41:32,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:41:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-13 17:41:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 17:41:32,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:32,382 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:32,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:32,586 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:32,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:32,586 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 20 times [2019-10-13 17:41:32,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:32,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622365282] [2019-10-13 17:41:32,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:32,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:32,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622365282] [2019-10-13 17:41:32,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322100491] [2019-10-13 17:41:32,965 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 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 [2019-10-13 17:41:33,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:33,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:33,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:41:33,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:33,119 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:33,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-13 17:41:33,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579336159] [2019-10-13 17:41:33,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:41:33,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:33,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:41:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:41:33,121 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 26 states. [2019-10-13 17:41:33,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:33,336 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2019-10-13 17:41:33,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:41:33,336 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2019-10-13 17:41:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:33,337 INFO L225 Difference]: With dead ends: 136 [2019-10-13 17:41:33,337 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 17:41:33,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:41:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 17:41:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-13 17:41:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-13 17:41:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-10-13 17:41:33,342 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 128 [2019-10-13 17:41:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:33,343 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-10-13 17:41:33,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:41:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-10-13 17:41:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 17:41:33,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:33,344 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:33,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:33,545 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:33,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2078845859, now seen corresponding path program 21 times [2019-10-13 17:41:33,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:33,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947072893] [2019-10-13 17:41:33,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:33,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:33,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:33,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947072893] [2019-10-13 17:41:33,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224112227] [2019-10-13 17:41:33,855 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 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 [2019-10-13 17:41:33,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-13 17:41:33,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:33,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:41:34,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2019-10-13 17:41:34,112 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:34,112 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2019-10-13 17:41:34,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498311229] [2019-10-13 17:41:34,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:41:34,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:34,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:41:34,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:41:34,115 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 33 states. [2019-10-13 17:41:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:34,394 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2019-10-13 17:41:34,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 17:41:34,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-10-13 17:41:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:34,395 INFO L225 Difference]: With dead ends: 141 [2019-10-13 17:41:34,395 INFO L226 Difference]: Without dead ends: 99 [2019-10-13 17:41:34,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:41:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-13 17:41:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-10-13 17:41:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-13 17:41:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-13 17:41:34,401 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 130 [2019-10-13 17:41:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:34,402 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-13 17:41:34,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:41:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-13 17:41:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 17:41:34,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:34,403 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:34,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:34,607 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:34,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 22 times [2019-10-13 17:41:34,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:34,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446716864] [2019-10-13 17:41:34,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:34,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:34,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:34,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446716864] [2019-10-13 17:41:34,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194170904] [2019-10-13 17:41:34,935 INFO L92 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 [2019-10-13 17:41:35,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:35,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:35,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:41:35,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:35,118 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:35,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-13 17:41:35,119 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237471294] [2019-10-13 17:41:35,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:41:35,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:35,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:41:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:35,121 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 28 states. [2019-10-13 17:41:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:35,427 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-10-13 17:41:35,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:41:35,428 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 134 [2019-10-13 17:41:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:35,429 INFO L225 Difference]: With dead ends: 144 [2019-10-13 17:41:35,429 INFO L226 Difference]: Without dead ends: 100 [2019-10-13 17:41:35,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-13 17:41:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-13 17:41:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-13 17:41:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-10-13 17:41:35,439 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 134 [2019-10-13 17:41:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:35,440 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-10-13 17:41:35,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:41:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-10-13 17:41:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 17:41:35,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:35,442 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:35,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:35,648 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1800218015, now seen corresponding path program 23 times [2019-10-13 17:41:35,649 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:35,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771480626] [2019-10-13 17:41:35,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:35,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:35,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:36,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771480626] [2019-10-13 17:41:36,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100491553] [2019-10-13 17:41:36,257 INFO L92 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 [2019-10-13 17:41:41,425 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-13 17:41:41,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:41,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:41,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2019-10-13 17:41:41,596 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:41,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-13 17:41:41,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782363059] [2019-10-13 17:41:41,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:41:41,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:41,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:41:41,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:41:41,598 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 36 states. [2019-10-13 17:41:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:42,202 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2019-10-13 17:41:42,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:41:42,203 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2019-10-13 17:41:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:42,204 INFO L225 Difference]: With dead ends: 149 [2019-10-13 17:41:42,204 INFO L226 Difference]: Without dead ends: 105 [2019-10-13 17:41:42,206 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 17:41:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-13 17:41:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-10-13 17:41:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-13 17:41:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2019-10-13 17:41:42,213 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 136 [2019-10-13 17:41:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:42,213 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2019-10-13 17:41:42,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:41:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2019-10-13 17:41:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 17:41:42,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:42,218 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:42,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:42,428 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1521279999, now seen corresponding path program 24 times [2019-10-13 17:41:42,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:42,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647286976] [2019-10-13 17:41:42,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:42,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:42,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-13 17:41:42,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647286976] [2019-10-13 17:41:42,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869710356] [2019-10-13 17:41:42,998 INFO L92 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 [2019-10-13 17:41:45,096 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 17:41:45,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:45,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:41:45,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2019-10-13 17:41:45,262 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:45,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2019-10-13 17:41:45,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764588807] [2019-10-13 17:41:45,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 17:41:45,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 17:41:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:41:45,264 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 38 states. [2019-10-13 17:41:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:45,755 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2019-10-13 17:41:45,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 17:41:45,756 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2019-10-13 17:41:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:45,757 INFO L225 Difference]: With dead ends: 155 [2019-10-13 17:41:45,757 INFO L226 Difference]: Without dead ends: 109 [2019-10-13 17:41:45,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=542, Invalid=1620, Unknown=0, NotChecked=0, Total=2162 [2019-10-13 17:41:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-13 17:41:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-10-13 17:41:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 17:41:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-13 17:41:45,763 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 144 [2019-10-13 17:41:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:45,763 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-13 17:41:45,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 17:41:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-13 17:41:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 17:41:45,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:45,764 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:45,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:45,970 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash -910092193, now seen corresponding path program 25 times [2019-10-13 17:41:45,971 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:45,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430329598] [2019-10-13 17:41:45,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:45,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:45,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:46,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430329598] [2019-10-13 17:41:46,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951981071] [2019-10-13 17:41:46,531 INFO L92 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 [2019-10-13 17:41:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:41:46,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:46,668 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:46,668 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 17:41:46,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439337064] [2019-10-13 17:41:46,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:41:46,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:41:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:41:46,670 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-13 17:41:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:46,898 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-13 17:41:46,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:41:46,899 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2019-10-13 17:41:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:46,901 INFO L225 Difference]: With dead ends: 158 [2019-10-13 17:41:46,901 INFO L226 Difference]: Without dead ends: 110 [2019-10-13 17:41:46,902 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:41:46,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-13 17:41:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-13 17:41:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-13 17:41:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-13 17:41:46,912 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 152 [2019-10-13 17:41:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:46,912 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-13 17:41:46,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:41:46,912 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-13 17:41:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 17:41:46,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:46,914 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:47,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:47,120 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:47,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1827051201, now seen corresponding path program 26 times [2019-10-13 17:41:47,121 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:47,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827819969] [2019-10-13 17:41:47,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:47,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:47,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:47,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827819969] [2019-10-13 17:41:47,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348431370] [2019-10-13 17:41:47,704 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 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 [2019-10-13 17:41:47,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:47,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:47,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 17:41:47,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:47,848 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:47,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-13 17:41:47,849 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119560704] [2019-10-13 17:41:47,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 17:41:47,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:47,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 17:41:47,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:41:47,850 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 32 states. [2019-10-13 17:41:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:48,099 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2019-10-13 17:41:48,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 17:41:48,100 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 154 [2019-10-13 17:41:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:48,101 INFO L225 Difference]: With dead ends: 160 [2019-10-13 17:41:48,101 INFO L226 Difference]: Without dead ends: 112 [2019-10-13 17:41:48,103 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:41:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-13 17:41:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2019-10-13 17:41:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-13 17:41:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2019-10-13 17:41:48,109 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 154 [2019-10-13 17:41:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:48,109 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2019-10-13 17:41:48,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 17:41:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2019-10-13 17:41:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 17:41:48,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:48,110 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:48,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:48,314 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash -593099613, now seen corresponding path program 27 times [2019-10-13 17:41:48,315 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:48,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474041521] [2019-10-13 17:41:48,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:48,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:48,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:48,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474041521] [2019-10-13 17:41:48,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898851290] [2019-10-13 17:41:48,754 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 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 [2019-10-13 17:41:48,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:41:48,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:48,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:48,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 370 proven. 49 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2019-10-13 17:41:49,066 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:49,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2019-10-13 17:41:49,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690300352] [2019-10-13 17:41:49,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 17:41:49,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:49,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 17:41:49,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 17:41:49,069 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 40 states. [2019-10-13 17:41:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:49,456 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-10-13 17:41:49,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 17:41:49,457 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 156 [2019-10-13 17:41:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:49,458 INFO L225 Difference]: With dead ends: 165 [2019-10-13 17:41:49,458 INFO L226 Difference]: Without dead ends: 117 [2019-10-13 17:41:49,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 17:41:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-13 17:41:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-10-13 17:41:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-13 17:41:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2019-10-13 17:41:49,466 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 156 [2019-10-13 17:41:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:49,466 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2019-10-13 17:41:49,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 17:41:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2019-10-13 17:41:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 17:41:49,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:49,468 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:49,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:49,670 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:49,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1573539069, now seen corresponding path program 28 times [2019-10-13 17:41:49,670 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:49,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2702066] [2019-10-13 17:41:49,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:49,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:49,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-13 17:41:50,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2702066] [2019-10-13 17:41:50,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206286829] [2019-10-13 17:41:50,200 INFO L92 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 [2019-10-13 17:41:50,314 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:50,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:50,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:41:50,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2019-10-13 17:41:50,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:50,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-10-13 17:41:50,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967198265] [2019-10-13 17:41:50,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-13 17:41:50,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-13 17:41:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1243, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:41:50,559 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 43 states. [2019-10-13 17:41:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:51,191 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2019-10-13 17:41:51,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-13 17:41:51,191 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 160 [2019-10-13 17:41:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:51,193 INFO L225 Difference]: With dead ends: 171 [2019-10-13 17:41:51,193 INFO L226 Difference]: Without dead ends: 121 [2019-10-13 17:41:51,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2019-10-13 17:41:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-13 17:41:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2019-10-13 17:41:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 17:41:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2019-10-13 17:41:51,211 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 160 [2019-10-13 17:41:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:51,211 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2019-10-13 17:41:51,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-13 17:41:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2019-10-13 17:41:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 17:41:51,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:51,213 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:51,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:51,418 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:51,419 INFO L82 PathProgramCache]: Analyzing trace with hash -451694749, now seen corresponding path program 29 times [2019-10-13 17:41:51,419 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:51,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557089674] [2019-10-13 17:41:51,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:51,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:51,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-13 17:41:52,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557089674] [2019-10-13 17:41:52,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078743970] [2019-10-13 17:41:52,021 INFO L92 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