/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_25x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:35:52,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:35:52,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:35:52,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 03:35:52,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:35:52,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:35:52,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:35:52,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:35:52,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:35:52,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:35:52,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:35:52,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:35:52,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:35:52,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:35:52,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:35:52,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:35:52,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:35:52,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:35:52,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:35:52,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:35:52,559 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 [2020-07-20 03:35:52,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:35:52,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:35:52,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:35:52,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:35:52,578 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:35:52,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:35:52,578 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:35:52,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:35:52,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:35:52,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:35:52,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:35:52,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:35:52,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:35:52,579 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:35:52,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:35:52,580 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:35:52,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:35:52,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:35:52,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:35:52,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:35:52,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:35:52,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:35:52,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:35:52,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:35:52,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:35:52,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:35:52,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:35:52,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:35:52,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:35:52,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:35:52,844 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:35:52,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:35:52,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:35:52,861 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:35:52,862 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:35:52,862 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-07-20 03:35:52,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61ab5b34/09284bd579cd40caa150469d64086bfd/FLAGffd549bde [2020-07-20 03:35:53,309 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:35:53,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-07-20 03:35:53,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61ab5b34/09284bd579cd40caa150469d64086bfd/FLAGffd549bde [2020-07-20 03:35:53,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61ab5b34/09284bd579cd40caa150469d64086bfd [2020-07-20 03:35:53,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:35:53,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:35:53,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:53,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:35:53,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:35:53,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:53" (1/1) ... [2020-07-20 03:35:53,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ad3b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53, skipping insertion in model container [2020-07-20 03:35:53,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:53" (1/1) ... [2020-07-20 03:35:53,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:35:53,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:35:53,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:53,929 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:35:53,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:53,959 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:35:53,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53 WrapperNode [2020-07-20 03:35:53,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:53,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:35:53,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:35:53,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:35:53,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53" (1/1) ... [2020-07-20 03:35:53,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53" (1/1) ... [2020-07-20 03:35:53,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53" (1/1) ... [2020-07-20 03:35:53,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53" (1/1) ... [2020-07-20 03:35:53,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53" (1/1) ... [2020-07-20 03:35:53,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53" (1/1) ... [2020-07-20 03:35:53,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53" (1/1) ... [2020-07-20 03:35:53,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:35:53,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:35:53,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:35:53,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:35:53,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53" (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 [2020-07-20 03:35:54,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:35:54,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:35:54,131 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 03:35:54,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:35:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:35:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 03:35:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:35:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:35:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:35:54,300 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:35:54,301 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:35:54,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:54 BoogieIcfgContainer [2020-07-20 03:35:54,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:35:54,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:35:54,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:35:54,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:35:54,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:35:53" (1/3) ... [2020-07-20 03:35:54,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fef01e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:54, skipping insertion in model container [2020-07-20 03:35:54,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:53" (2/3) ... [2020-07-20 03:35:54,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fef01e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:54, skipping insertion in model container [2020-07-20 03:35:54,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:54" (3/3) ... [2020-07-20 03:35:54,312 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2020-07-20 03:35:54,322 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:35:54,329 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:35:54,343 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:35:54,365 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:35:54,366 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:35:54,366 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:35:54,366 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:35:54,366 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:35:54,366 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:35:54,367 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:35:54,367 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:35:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 03:35:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:35:54,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:54,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:54,392 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 03:35:54,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:54,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500950046] [2020-07-20 03:35:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:35:54,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500950046] [2020-07-20 03:35:54,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:35:54,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:35:54,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14455047] [2020-07-20 03:35:54,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:35:54,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:54,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:35:54,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:35:54,631 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 03:35:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:54,721 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 03:35:54,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:35:54,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:35:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:54,735 INFO L225 Difference]: With dead ends: 30 [2020-07-20 03:35:54,736 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 03:35:54,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:35:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 03:35:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 03:35:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 03:35:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 03:35:54,784 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 03:35:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:54,785 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 03:35:54,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:35:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 03:35:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 03:35:54,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:54,787 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:54,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:35:54,788 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:54,788 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 03:35:54,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:54,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454677848] [2020-07-20 03:35:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:35:54,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454677848] [2020-07-20 03:35:54,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077267618] [2020-07-20 03:35:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@482e8fa3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:54,979 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@482e8fa3 issued 2 check-sat command(s) [2020-07-20 03:35:54,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:54,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:35:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:35:55,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:55,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 03:35:55,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220687015] [2020-07-20 03:35:55,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:35:55,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:55,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:35:55,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:35:55,045 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-20 03:35:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:55,109 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 03:35:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:35:55,110 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-20 03:35:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:55,111 INFO L225 Difference]: With dead ends: 25 [2020-07-20 03:35:55,111 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 03:35:55,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:35:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 03:35:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 03:35:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:35:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 03:35:55,120 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 03:35:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:55,121 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 03:35:55,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:35:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 03:35:55,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 03:35:55,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:55,123 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:55,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 03:35:55,337 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:55,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:55,339 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 03:35:55,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:55,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104486399] [2020-07-20 03:35:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:35:55,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104486399] [2020-07-20 03:35:55,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193805494] [2020-07-20 03:35:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7373b4d8 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 [2020-07-20 03:35:55,571 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7373b4d8 issued 2 check-sat command(s) [2020-07-20 03:35:55,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:55,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:35:55,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:35:55,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:55,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-20 03:35:55,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829224826] [2020-07-20 03:35:55,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:35:55,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:35:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:35:55,634 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-20 03:35:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:55,732 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 03:35:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:35:55,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-20 03:35:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:55,734 INFO L225 Difference]: With dead ends: 28 [2020-07-20 03:35:55,734 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 03:35:55,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:35:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 03:35:55,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 03:35:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 03:35:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 03:35:55,742 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 03:35:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:55,743 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 03:35:55,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:35:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 03:35:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:35:55,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:55,744 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:55,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:55,948 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:55,950 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 03:35:55,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:55,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589034625] [2020-07-20 03:35:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:35:56,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589034625] [2020-07-20 03:35:56,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205920155] [2020-07-20 03:35:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@232667c2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:56,152 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@232667c2 issued 2 check-sat command(s) [2020-07-20 03:35:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:56,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:35:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:35:56,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:56,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 03:35:56,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995650056] [2020-07-20 03:35:56,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:35:56,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:56,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:35:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:35:56,187 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-20 03:35:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:56,271 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 03:35:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:35:56,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-20 03:35:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:56,273 INFO L225 Difference]: With dead ends: 31 [2020-07-20 03:35:56,273 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 03:35:56,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:35:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 03:35:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 03:35:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:35:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 03:35:56,281 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 03:35:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:56,281 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 03:35:56,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:35:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 03:35:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:35:56,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:56,283 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:56,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:56,488 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:56,489 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 03:35:56,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:56,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998546360] [2020-07-20 03:35:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 03:35:56,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998546360] [2020-07-20 03:35:56,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511750740] [2020-07-20 03:35:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d3087c4 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 [2020-07-20 03:35:56,710 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d3087c4 issued 2 check-sat command(s) [2020-07-20 03:35:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:56,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:35:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 03:35:56,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:56,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-20 03:35:56,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999480539] [2020-07-20 03:35:56,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:35:56,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:35:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:35:56,772 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-20 03:35:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:56,882 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 03:35:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:35:56,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 03:35:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:56,886 INFO L225 Difference]: With dead ends: 34 [2020-07-20 03:35:56,886 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:35:56,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:35:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:35:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 03:35:56,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:35:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 03:35:56,899 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 03:35:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:56,900 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 03:35:56,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:35:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 03:35:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 03:35:56,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:56,905 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:57,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:57,117 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:57,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:57,118 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 03:35:57,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:57,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936735430] [2020-07-20 03:35:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 03:35:57,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936735430] [2020-07-20 03:35:57,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287846607] [2020-07-20 03:35:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12b302c3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:57,471 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12b302c3 issued 2 check-sat command(s) [2020-07-20 03:35:57,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:35:57,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 03:35:57,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:57,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-20 03:35:57,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241770818] [2020-07-20 03:35:57,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:35:57,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:57,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:35:57,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:35:57,516 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-20 03:35:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:57,608 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 03:35:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:35:57,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-20 03:35:57,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:57,610 INFO L225 Difference]: With dead ends: 37 [2020-07-20 03:35:57,610 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 03:35:57,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:35:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 03:35:57,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 03:35:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:35:57,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 03:35:57,617 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 03:35:57,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:57,618 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 03:35:57,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:35:57,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 03:35:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 03:35:57,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:57,620 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:57,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 03:35:57,835 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:57,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 03:35:57,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:57,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833372673] [2020-07-20 03:35:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 03:35:58,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833372673] [2020-07-20 03:35:58,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964879520] [2020-07-20 03:35:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1574cbdc 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 [2020-07-20 03:35:58,064 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1574cbdc issued 2 check-sat command(s) [2020-07-20 03:35:58,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:58,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 03:35:58,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 03:35:58,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:58,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-20 03:35:58,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603668431] [2020-07-20 03:35:58,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:35:58,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:58,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:35:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:35:58,120 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 03:35:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:58,249 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 03:35:58,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:35:58,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-20 03:35:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:58,251 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:35:58,251 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 03:35:58,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:35:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 03:35:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 03:35:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 03:35:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 03:35:58,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 03:35:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:58,262 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 03:35:58,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:35:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 03:35:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 03:35:58,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:58,269 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:58,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:58,470 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 03:35:58,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:58,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598005217] [2020-07-20 03:35:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 03:35:58,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598005217] [2020-07-20 03:35:58,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209543466] [2020-07-20 03:35:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63c61a90 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:58,786 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63c61a90 issued 2 check-sat command(s) [2020-07-20 03:35:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 03:35:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 03:35:58,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:58,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-20 03:35:58,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110386713] [2020-07-20 03:35:58,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:35:58,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:58,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:35:58,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:35:58,857 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-20 03:35:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:59,000 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 03:35:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 03:35:59,001 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-20 03:35:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:59,003 INFO L225 Difference]: With dead ends: 43 [2020-07-20 03:35:59,003 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 03:35:59,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:35:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 03:35:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 03:35:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:35:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 03:35:59,017 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 03:35:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:59,018 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 03:35:59,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:35:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 03:35:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 03:35:59,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:59,021 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:59,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:59,240 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:59,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 03:35:59,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:59,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559150307] [2020-07-20 03:35:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 03:35:59,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559150307] [2020-07-20 03:35:59,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852105175] [2020-07-20 03:35:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@311ed6f9 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 [2020-07-20 03:35:59,514 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@311ed6f9 issued 2 check-sat command(s) [2020-07-20 03:35:59,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:59,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 03:35:59,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 03:35:59,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:59,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-20 03:35:59,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549189298] [2020-07-20 03:35:59,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:35:59,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:35:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:35:59,551 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-20 03:35:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:59,697 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 03:35:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:35:59,697 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-20 03:35:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:59,699 INFO L225 Difference]: With dead ends: 46 [2020-07-20 03:35:59,699 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 03:35:59,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-20 03:35:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 03:35:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 03:35:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 03:35:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 03:35:59,706 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 03:35:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:59,707 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 03:35:59,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:35:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 03:35:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 03:35:59,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:59,708 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:59,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 03:35:59,923 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:59,924 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 03:35:59,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:59,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318386034] [2020-07-20 03:35:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:35:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 03:36:00,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318386034] [2020-07-20 03:36:00,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900280723] [2020-07-20 03:36:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36bdc759 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:00,248 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36bdc759 issued 2 check-sat command(s) [2020-07-20 03:36:00,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:00,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 03:36:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 03:36:00,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:00,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-20 03:36:00,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036089103] [2020-07-20 03:36:00,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:36:00,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:36:00,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:36:00,290 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-20 03:36:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:00,430 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 03:36:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 03:36:00,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-20 03:36:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:00,435 INFO L225 Difference]: With dead ends: 49 [2020-07-20 03:36:00,435 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 03:36:00,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-20 03:36:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 03:36:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 03:36:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 03:36:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 03:36:00,449 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 03:36:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:00,449 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 03:36:00,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:36:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 03:36:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 03:36:00,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:00,456 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:00,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:00,671 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:00,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 03:36:00,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:00,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121139203] [2020-07-20 03:36:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 03:36:01,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121139203] [2020-07-20 03:36:01,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128366246] [2020-07-20 03:36:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a321d57 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 [2020-07-20 03:36:01,100 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a321d57 issued 2 check-sat command(s) [2020-07-20 03:36:01,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:01,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 03:36:01,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 03:36:01,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:01,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-20 03:36:01,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685717227] [2020-07-20 03:36:01,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:36:01,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:36:01,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:36:01,151 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-20 03:36:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:01,321 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 03:36:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:36:01,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-20 03:36:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:01,325 INFO L225 Difference]: With dead ends: 52 [2020-07-20 03:36:01,325 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 03:36:01,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-20 03:36:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 03:36:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 03:36:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:36:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 03:36:01,345 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 03:36:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:01,346 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 03:36:01,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:36:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 03:36:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 03:36:01,347 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:01,349 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:01,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:01,550 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:01,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-20 03:36:01,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:01,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417740803] [2020-07-20 03:36:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 03:36:01,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417740803] [2020-07-20 03:36:01,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774622653] [2020-07-20 03:36:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f5f8dd3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:02,024 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f5f8dd3 issued 2 check-sat command(s) [2020-07-20 03:36:02,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 03:36:02,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 03:36:02,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:02,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-20 03:36:02,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036787094] [2020-07-20 03:36:02,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 03:36:02,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:02,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 03:36:02,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:36:02,070 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-20 03:36:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:02,229 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 03:36:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:36:02,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-20 03:36:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:02,231 INFO L225 Difference]: With dead ends: 55 [2020-07-20 03:36:02,231 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 03:36:02,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-20 03:36:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 03:36:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 03:36:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:36:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 03:36:02,239 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 03:36:02,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:02,239 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 03:36:02,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 03:36:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 03:36:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 03:36:02,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:02,241 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:02,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 03:36:02,447 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:02,448 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-20 03:36:02,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:02,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455869091] [2020-07-20 03:36:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 03:36:02,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455869091] [2020-07-20 03:36:02,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758001360] [2020-07-20 03:36:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b71d722 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 [2020-07-20 03:36:02,931 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b71d722 issued 2 check-sat command(s) [2020-07-20 03:36:02,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 03:36:02,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 03:36:02,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:02,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-20 03:36:02,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012236023] [2020-07-20 03:36:02,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:36:02,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:02,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:36:02,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:36:02,973 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-20 03:36:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:03,166 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 03:36:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:36:03,167 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-20 03:36:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:03,168 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:36:03,168 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 03:36:03,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-20 03:36:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 03:36:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 03:36:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 03:36:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 03:36:03,175 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 03:36:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:03,175 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 03:36:03,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:36:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 03:36:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 03:36:03,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:03,177 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:03,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 03:36:03,378 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-20 03:36:03,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:03,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270542480] [2020-07-20 03:36:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 03:36:03,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270542480] [2020-07-20 03:36:03,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88918409] [2020-07-20 03:36:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70d3ad97 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:03,883 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70d3ad97 issued 2 check-sat command(s) [2020-07-20 03:36:03,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:03,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 03:36:03,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 03:36:03,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:03,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-20 03:36:03,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207722347] [2020-07-20 03:36:03,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 03:36:03,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 03:36:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:36:03,937 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-20 03:36:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:04,157 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 03:36:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 03:36:04,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-20 03:36:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:04,159 INFO L225 Difference]: With dead ends: 61 [2020-07-20 03:36:04,159 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 03:36:04,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 03:36:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 03:36:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 03:36:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 03:36:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 03:36:04,166 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 03:36:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:04,166 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 03:36:04,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 03:36:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 03:36:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 03:36:04,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:04,168 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:04,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 03:36:04,381 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:04,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-20 03:36:04,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:04,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559161001] [2020-07-20 03:36:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 03:36:04,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559161001] [2020-07-20 03:36:04,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693601859] [2020-07-20 03:36:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40599ab5 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 [2020-07-20 03:36:05,028 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40599ab5 issued 2 check-sat command(s) [2020-07-20 03:36:05,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:05,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 03:36:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 03:36:05,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:05,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-20 03:36:05,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920651945] [2020-07-20 03:36:05,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 03:36:05,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 03:36:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:36:05,085 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-20 03:36:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:05,288 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 03:36:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:36:05,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-20 03:36:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:05,289 INFO L225 Difference]: With dead ends: 64 [2020-07-20 03:36:05,290 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 03:36:05,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 03:36:05,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 03:36:05,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 03:36:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 03:36:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 03:36:05,297 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 03:36:05,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:05,297 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 03:36:05,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 03:36:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 03:36:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 03:36:05,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:05,298 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:05,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:05,499 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:05,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-20 03:36:05,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:05,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053798728] [2020-07-20 03:36:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 03:36:06,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053798728] [2020-07-20 03:36:06,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514325864] [2020-07-20 03:36:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14e2301f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:06,156 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14e2301f issued 2 check-sat command(s) [2020-07-20 03:36:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 03:36:06,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 03:36:06,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:06,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-07-20 03:36:06,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056291873] [2020-07-20 03:36:06,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 03:36:06,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:06,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 03:36:06,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:36:06,200 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-07-20 03:36:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:06,484 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-20 03:36:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 03:36:06,484 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-07-20 03:36:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:06,485 INFO L225 Difference]: With dead ends: 67 [2020-07-20 03:36:06,486 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 03:36:06,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 03:36:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 03:36:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-20 03:36:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 03:36:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-20 03:36:06,493 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-20 03:36:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:06,494 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-20 03:36:06,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 03:36:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-20 03:36:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 03:36:06,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:06,496 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:06,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 03:36:06,706 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:06,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-07-20 03:36:06,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:06,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385362467] [2020-07-20 03:36:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 03:36:07,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385362467] [2020-07-20 03:36:07,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316546154] [2020-07-20 03:36:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31444375 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 [2020-07-20 03:36:07,443 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31444375 issued 2 check-sat command(s) [2020-07-20 03:36:07,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:07,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 03:36:07,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 03:36:07,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:07,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-07-20 03:36:07,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847455866] [2020-07-20 03:36:07,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 03:36:07,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:07,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 03:36:07,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:36:07,509 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 22 states. [2020-07-20 03:36:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:07,809 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-20 03:36:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 03:36:07,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-07-20 03:36:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:07,811 INFO L225 Difference]: With dead ends: 70 [2020-07-20 03:36:07,811 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 03:36:07,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 03:36:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 03:36:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 03:36:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 03:36:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-20 03:36:07,821 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-20 03:36:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:07,821 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-20 03:36:07,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 03:36:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-20 03:36:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-20 03:36:07,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:07,824 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:08,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 03:36:08,036 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-07-20 03:36:08,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:08,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728604727] [2020-07-20 03:36:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 03:36:08,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728604727] [2020-07-20 03:36:08,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066875338] [2020-07-20 03:36:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4cb9d81d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:08,803 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4cb9d81d issued 2 check-sat command(s) [2020-07-20 03:36:08,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:08,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 03:36:08,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 03:36:08,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:08,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-07-20 03:36:08,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367951073] [2020-07-20 03:36:08,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 03:36:08,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:08,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 03:36:08,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-20 03:36:08,857 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 23 states. [2020-07-20 03:36:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:09,111 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-20 03:36:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 03:36:09,111 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-07-20 03:36:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:09,112 INFO L225 Difference]: With dead ends: 73 [2020-07-20 03:36:09,112 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 03:36:09,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 03:36:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 03:36:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 03:36:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 03:36:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-20 03:36:09,121 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-20 03:36:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:09,122 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-20 03:36:09,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 03:36:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-20 03:36:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 03:36:09,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:09,124 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:09,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 03:36:09,336 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:09,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:09,336 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-07-20 03:36:09,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:09,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202187050] [2020-07-20 03:36:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 03:36:10,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202187050] [2020-07-20 03:36:10,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812482458] [2020-07-20 03:36:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19f783a8 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 [2020-07-20 03:36:10,336 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19f783a8 issued 2 check-sat command(s) [2020-07-20 03:36:10,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:10,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 03:36:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 03:36:10,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:10,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-07-20 03:36:10,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665905280] [2020-07-20 03:36:10,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 03:36:10,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:10,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 03:36:10,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:36:10,429 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 24 states. [2020-07-20 03:36:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:10,811 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-20 03:36:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 03:36:10,812 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-07-20 03:36:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:10,813 INFO L225 Difference]: With dead ends: 76 [2020-07-20 03:36:10,814 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 03:36:10,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 03:36:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 03:36:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-20 03:36:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 03:36:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-20 03:36:10,828 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-20 03:36:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:10,828 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-20 03:36:10,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 03:36:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-20 03:36:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 03:36:10,831 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:10,832 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:11,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:11,047 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:11,047 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-07-20 03:36:11,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:11,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848077980] [2020-07-20 03:36:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 03:36:12,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848077980] [2020-07-20 03:36:12,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060619316] [2020-07-20 03:36:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70193cc1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:12,206 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70193cc1 issued 2 check-sat command(s) [2020-07-20 03:36:12,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-20 03:36:12,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 03:36:12,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:12,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-07-20 03:36:12,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746663775] [2020-07-20 03:36:12,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 03:36:12,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:12,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 03:36:12,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-20 03:36:12,261 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 25 states. [2020-07-20 03:36:12,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:12,568 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-20 03:36:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 03:36:12,568 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2020-07-20 03:36:12,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:12,569 INFO L225 Difference]: With dead ends: 79 [2020-07-20 03:36:12,570 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 03:36:12,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 03:36:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 03:36:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 03:36:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 03:36:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-20 03:36:12,574 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-20 03:36:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:12,575 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-20 03:36:12,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 03:36:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-20 03:36:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 03:36:12,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:12,577 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:12,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:12,778 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:12,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-07-20 03:36:12,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:12,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032687508] [2020-07-20 03:36:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-20 03:36:13,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032687508] [2020-07-20 03:36:13,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920369328] [2020-07-20 03:36:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79fdb8c8 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 [2020-07-20 03:36:13,808 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79fdb8c8 issued 2 check-sat command(s) [2020-07-20 03:36:13,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:13,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-20 03:36:13,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-20 03:36:13,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:13,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-07-20 03:36:13,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348494244] [2020-07-20 03:36:13,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 03:36:13,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 03:36:13,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-20 03:36:13,909 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 26 states. [2020-07-20 03:36:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:14,254 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-20 03:36:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 03:36:14,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 133 [2020-07-20 03:36:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:14,256 INFO L225 Difference]: With dead ends: 82 [2020-07-20 03:36:14,256 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 03:36:14,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 03:36:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 03:36:14,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-20 03:36:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 03:36:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-20 03:36:14,261 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-07-20 03:36:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:14,263 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-20 03:36:14,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 03:36:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-20 03:36:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-20 03:36:14,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:14,265 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:14,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 03:36:14,478 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:14,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:14,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2020-07-20 03:36:14,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:14,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408270219] [2020-07-20 03:36:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-20 03:36:15,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408270219] [2020-07-20 03:36:15,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873968264] [2020-07-20 03:36:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29ecaaff No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:15,438 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29ecaaff issued 2 check-sat command(s) [2020-07-20 03:36:15,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:15,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-20 03:36:15,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-20 03:36:15,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:15,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-07-20 03:36:15,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846950431] [2020-07-20 03:36:15,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 03:36:15,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:15,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 03:36:15,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-07-20 03:36:15,502 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 27 states. [2020-07-20 03:36:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:15,838 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-07-20 03:36:15,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 03:36:15,840 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 139 [2020-07-20 03:36:15,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:15,841 INFO L225 Difference]: With dead ends: 85 [2020-07-20 03:36:15,841 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 03:36:15,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 03:36:15,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 03:36:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-20 03:36:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 03:36:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-07-20 03:36:15,846 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-07-20 03:36:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:15,847 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-07-20 03:36:15,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 03:36:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-07-20 03:36:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-20 03:36:15,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:15,848 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:16,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 03:36:16,062 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:16,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2020-07-20 03:36:16,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:16,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497233369] [2020-07-20 03:36:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-20 03:36:17,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497233369] [2020-07-20 03:36:17,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460871136] [2020-07-20 03:36:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@798ff126 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 [2020-07-20 03:36:17,143 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@798ff126 issued 2 check-sat command(s) [2020-07-20 03:36:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-20 03:36:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-20 03:36:17,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:17,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-07-20 03:36:17,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194391165] [2020-07-20 03:36:17,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 03:36:17,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:17,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 03:36:17,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-07-20 03:36:17,200 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 28 states. [2020-07-20 03:36:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:17,567 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-07-20 03:36:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 03:36:17,569 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 145 [2020-07-20 03:36:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:17,571 INFO L225 Difference]: With dead ends: 88 [2020-07-20 03:36:17,571 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 03:36:17,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 03:36:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 03:36:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-07-20 03:36:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 03:36:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-07-20 03:36:17,577 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-07-20 03:36:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:17,578 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-07-20 03:36:17,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 03:36:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-07-20 03:36:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-20 03:36:17,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:17,579 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:17,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:17,789 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2020-07-20 03:36:17,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:17,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978540469] [2020-07-20 03:36:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-20 03:36:18,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978540469] [2020-07-20 03:36:18,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505235597] [2020-07-20 03:36:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b56d3f4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:18,972 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b56d3f4 issued 2 check-sat command(s) [2020-07-20 03:36:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-20 03:36:18,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-20 03:36:19,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:19,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-07-20 03:36:19,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110871739] [2020-07-20 03:36:19,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 03:36:19,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:19,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 03:36:19,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-07-20 03:36:19,053 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 29 states. [2020-07-20 03:36:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:19,420 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-07-20 03:36:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 03:36:19,420 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 151 [2020-07-20 03:36:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:19,422 INFO L225 Difference]: With dead ends: 91 [2020-07-20 03:36:19,422 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 03:36:19,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 03:36:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 03:36:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-07-20 03:36:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 03:36:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-07-20 03:36:19,428 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-07-20 03:36:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:19,431 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-07-20 03:36:19,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 03:36:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-07-20 03:36:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-20 03:36:19,432 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:19,432 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:19,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 03:36:19,634 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:19,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:19,634 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2020-07-20 03:36:19,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:19,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607032565] [2020-07-20 03:36:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-20 03:36:20,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607032565] [2020-07-20 03:36:20,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424434344] [2020-07-20 03:36:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72be9bef 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 [2020-07-20 03:36:20,867 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72be9bef issued 2 check-sat command(s) [2020-07-20 03:36:20,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-20 03:36:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-20 03:36:20,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:20,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-07-20 03:36:20,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366843567] [2020-07-20 03:36:20,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 03:36:20,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 03:36:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:36:20,929 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 30 states. [2020-07-20 03:36:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:21,318 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-07-20 03:36:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 03:36:21,319 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 157 [2020-07-20 03:36:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:21,321 INFO L225 Difference]: With dead ends: 94 [2020-07-20 03:36:21,321 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 03:36:21,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 03:36:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 03:36:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-20 03:36:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 03:36:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-07-20 03:36:21,327 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-07-20 03:36:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:21,327 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-07-20 03:36:21,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 03:36:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-07-20 03:36:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-20 03:36:21,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:21,329 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:21,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:21,535 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2020-07-20 03:36:21,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:21,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87941030] [2020-07-20 03:36:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@195d7dcd [2020-07-20 03:36:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 924 proven. 50 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-07-20 03:36:24,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87941030] [2020-07-20 03:36:24,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956333745] [2020-07-20 03:36:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a510851 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:24,956 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a510851 issued 4 check-sat command(s) [2020-07-20 03:36:24,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:24,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 03:36:24,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 49 proven. 950 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2020-07-20 03:36:29,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:29,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59] total 114 [2020-07-20 03:36:29,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694835076] [2020-07-20 03:36:29,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-07-20 03:36:29,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-07-20 03:36:29,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=12042, Unknown=0, NotChecked=0, Total=12882 [2020-07-20 03:36:29,693 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 114 states. [2020-07-20 03:36:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:37,917 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-07-20 03:36:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-20 03:36:37,919 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 163 [2020-07-20 03:36:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:37,920 INFO L225 Difference]: With dead ends: 93 [2020-07-20 03:36:37,920 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:36:37,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5271 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1962, Invalid=25760, Unknown=0, NotChecked=0, Total=27722 [2020-07-20 03:36:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:36:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:36:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:36:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:36:37,929 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 163 [2020-07-20 03:36:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:37,929 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:36:37,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-07-20 03:36:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:36:37,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:36:38,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 03:36:38,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:36:38,182 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 03:36:38,183 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:36:38,183 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:36:38,183 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:36:38,183 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:36:38,183 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:36:38,183 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 03:36:38,184 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2020-07-20 03:36:38,184 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 03:36:38,184 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 03:36:38,184 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 03:36:38,184 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 03:36:38,184 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 03:36:38,184 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 03:36:38,184 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 03:36:38,185 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 03:36:38,185 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 03:36:38,185 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 25 main_~a~0) [2020-07-20 03:36:38,185 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 03:36:38,185 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 03:36:38,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:36:38 BoogieIcfgContainer [2020-07-20 03:36:38,192 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:36:38,194 INFO L168 Benchmark]: Toolchain (without parser) took 44475.35 ms. Allocated memory was 136.8 MB in the beginning and 782.8 MB in the end (delta: 645.9 MB). Free memory was 100.4 MB in the beginning and 384.8 MB in the end (delta: -284.4 MB). Peak memory consumption was 361.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:38,195 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 03:36:38,195 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.25 ms. Allocated memory is still 136.8 MB. Free memory was 100.0 MB in the beginning and 90.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:38,195 INFO L168 Benchmark]: Boogie Preprocessor took 27.00 ms. Allocated memory is still 136.8 MB. Free memory was 90.4 MB in the beginning and 89.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:38,196 INFO L168 Benchmark]: RCFGBuilder took 316.99 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 89.1 MB in the beginning and 169.0 MB in the end (delta: -79.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:38,196 INFO L168 Benchmark]: TraceAbstraction took 43886.79 ms. Allocated memory was 200.3 MB in the beginning and 782.8 MB in the end (delta: 582.5 MB). Free memory was 168.3 MB in the beginning and 384.8 MB in the end (delta: -216.5 MB). Peak memory consumption was 366.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:38,199 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.25 ms. Allocated memory is still 136.8 MB. Free memory was 100.0 MB in the beginning and 90.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.00 ms. Allocated memory is still 136.8 MB. Free memory was 90.4 MB in the beginning and 89.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 316.99 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 89.1 MB in the beginning and 169.0 MB in the end (delta: -79.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 43886.79 ms. Allocated memory was 200.3 MB in the beginning and 782.8 MB in the end (delta: 582.5 MB). Free memory was 168.3 MB in the beginning and 384.8 MB in the end (delta: -216.5 MB). Peak memory consumption was 366.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 43.7s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 13.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 337 SDtfs, 1317 SDslu, 3695 SDs, 0 SdLazy, 5023 SolverSat, 457 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3839 GetRequests, 2950 SyntacticMatches, 0 SemanticMatches, 889 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10471 ImplicationChecksByTransitivity, 20.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 18 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 22.0s InterpolantComputationTime, 4563 NumberOfCodeBlocks, 3531 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 4512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1516410 SizeOfPredicates, 379 NumberOfNonLiveVariables, 5298 ConjunctsInSsa, 913 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 17800/33800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...