/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:00:16,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:00:16,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:00:16,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:00:16,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:00:16,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:00:16,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:00:16,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:00:16,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:00:16,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:00:16,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:00:16,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:00:16,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:00:16,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:00:16,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:00:16,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:00:16,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:00:16,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:00:16,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:00:16,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:00:16,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:00:16,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:00:16,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:00:16,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:00:16,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:00:16,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:00:16,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:00:16,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:00:16,796 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 [2020-07-17 12:00:16,831 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:00:16,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:00:16,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:00:16,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:00:16,836 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:00:16,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:00:16,837 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:00:16,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:00:16,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:00:16,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:00:16,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:00:16,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:00:16,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:00:16,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:00:16,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:00:16,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:00:16,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:00:16,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:00:16,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:00:16,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:00:16,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:00:16,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:00:16,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:00:16,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:00:16,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:00:16,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:00:16,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:00:16,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:00:16,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:00:16,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:00:17,144 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:00:17,166 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:00:17,170 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:00:17,172 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:00:17,172 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:00:17,173 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-17 12:00:17,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bcf38594/be58072d402b41308525c5bcc3f16684/FLAGb00bb06f8 [2020-07-17 12:00:17,718 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:00:17,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-17 12:00:17,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bcf38594/be58072d402b41308525c5bcc3f16684/FLAGb00bb06f8 [2020-07-17 12:00:18,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bcf38594/be58072d402b41308525c5bcc3f16684 [2020-07-17 12:00:18,095 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:00:18,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:00:18,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:00:18,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:00:18,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:00:18,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:00:18" (1/1) ... [2020-07-17 12:00:18,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3d71eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18, skipping insertion in model container [2020-07-17 12:00:18,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:00:18" (1/1) ... [2020-07-17 12:00:18,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:00:18,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:00:18,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:00:18,372 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:00:18,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:00:18,403 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:00:18,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18 WrapperNode [2020-07-17 12:00:18,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:00:18,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:00:18,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:00:18,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:00:18,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18" (1/1) ... [2020-07-17 12:00:18,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18" (1/1) ... [2020-07-17 12:00:18,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18" (1/1) ... [2020-07-17 12:00:18,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18" (1/1) ... [2020-07-17 12:00:18,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18" (1/1) ... [2020-07-17 12:00:18,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18" (1/1) ... [2020-07-17 12:00:18,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18" (1/1) ... [2020-07-17 12:00:18,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:00:18,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:00:18,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:00:18,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:00:18,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18" (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 [2020-07-17 12:00:18,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:00:18,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:00:18,584 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-17 12:00:18,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:00:18,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:00:18,585 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-17 12:00:18,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:00:18,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:00:18,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:00:18,752 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:00:18,752 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 12:00:18,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:00:18 BoogieIcfgContainer [2020-07-17 12:00:18,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:00:18,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:00:18,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:00:18,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:00:18,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:00:18" (1/3) ... [2020-07-17 12:00:18,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0bc2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:00:18, skipping insertion in model container [2020-07-17 12:00:18,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:18" (2/3) ... [2020-07-17 12:00:18,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0bc2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:00:18, skipping insertion in model container [2020-07-17 12:00:18,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:00:18" (3/3) ... [2020-07-17 12:00:18,766 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-07-17 12:00:18,777 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:00:18,785 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:00:18,804 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:00:18,844 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:00:18,844 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:00:18,844 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:00:18,845 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:00:18,846 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:00:18,846 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:00:18,846 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:00:18,846 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:00:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-17 12:00:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 12:00:18,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:18,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:18,888 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:18,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-17 12:00:18,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:18,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016479943] [2020-07-17 12:00:18,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:00:19,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016479943] [2020-07-17 12:00:19,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:00:19,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:00:19,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079908459] [2020-07-17 12:00:19,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:00:19,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:19,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:00:19,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:00:19,143 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-17 12:00:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:19,247 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-17 12:00:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:00:19,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-17 12:00:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:19,260 INFO L225 Difference]: With dead ends: 30 [2020-07-17 12:00:19,260 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 12:00:19,264 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 [2020-07-17 12:00:19,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 12:00:19,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-17 12:00:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-17 12:00:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-17 12:00:19,307 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-17 12:00:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:19,307 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-17 12:00:19,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:00:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-17 12:00:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 12:00:19,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:19,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:19,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:00:19,311 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:19,311 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-17 12:00:19,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:19,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610068622] [2020-07-17 12:00:19,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 12:00:19,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610068622] [2020-07-17 12:00:19,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097945170] [2020-07-17 12:00:19,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,496 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:00:19,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 12:00:19,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:19,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-17 12:00:19,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556426736] [2020-07-17 12:00:19,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:00:19,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:00:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:00:19,573 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-17 12:00:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:19,663 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-17 12:00:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:00:19,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-17 12:00:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:19,665 INFO L225 Difference]: With dead ends: 25 [2020-07-17 12:00:19,666 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 12:00:19,667 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 [2020-07-17 12:00:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 12:00:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-17 12:00:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 12:00:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-17 12:00:19,674 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-17 12:00:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:19,675 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-17 12:00:19,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:00:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-17 12:00:19,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:00:19,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:19,677 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:19,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 12:00:19,887 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-17 12:00:19,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:19,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000234297] [2020-07-17 12:00:19,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:00:20,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000234297] [2020-07-17 12:00:20,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060663703] [2020-07-17 12:00:20,065 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:20,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:00:20,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:20,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 12:00:20,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:00:20,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:20,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-17 12:00:20,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211904094] [2020-07-17 12:00:20,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:00:20,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:20,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:00:20,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:00:20,139 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-17 12:00:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:20,220 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-17 12:00:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:00:20,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-17 12:00:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:20,222 INFO L225 Difference]: With dead ends: 28 [2020-07-17 12:00:20,223 INFO L226 Difference]: Without dead ends: 24 [2020-07-17 12:00:20,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:00:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-17 12:00:20,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-17 12:00:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-17 12:00:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-17 12:00:20,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-17 12:00:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:20,232 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-17 12:00:20,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:00:20,232 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-17 12:00:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:00:20,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:20,234 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:20,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:20,447 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:20,448 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-17 12:00:20,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:20,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245856805] [2020-07-17 12:00:20,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 12:00:20,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245856805] [2020-07-17 12:00:20,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217492569] [2020-07-17 12:00:20,620 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:20,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 12:00:20,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:20,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 12:00:20,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 12:00:20,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:20,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-17 12:00:20,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219889491] [2020-07-17 12:00:20,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 12:00:20,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:20,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 12:00:20,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:00:20,695 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-17 12:00:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:20,774 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-17 12:00:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:00:20,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-17 12:00:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:20,776 INFO L225 Difference]: With dead ends: 31 [2020-07-17 12:00:20,776 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 12:00:20,777 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 [2020-07-17 12:00:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 12:00:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-17 12:00:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 12:00:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-17 12:00:20,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-17 12:00:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:20,784 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-17 12:00:20,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 12:00:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-17 12:00:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 12:00:20,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:20,786 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:21,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:21,001 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-17 12:00:21,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:21,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529056648] [2020-07-17 12:00:21,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 12:00:21,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529056648] [2020-07-17 12:00:21,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415810965] [2020-07-17 12:00:21,217 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:21,257 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:00:21,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:21,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-17 12:00:21,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 12:00:21,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:21,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-17 12:00:21,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145610659] [2020-07-17 12:00:21,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:00:21,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:21,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:00:21,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:00:21,313 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-17 12:00:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:21,408 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-17 12:00:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 12:00:21,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-17 12:00:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:21,410 INFO L225 Difference]: With dead ends: 34 [2020-07-17 12:00:21,410 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 12:00:21,411 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 [2020-07-17 12:00:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 12:00:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 12:00:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 12:00:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-17 12:00:21,418 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-17 12:00:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:21,419 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-17 12:00:21,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:00:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-17 12:00:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-17 12:00:21,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:21,421 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:21,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:21,634 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:21,634 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-17 12:00:21,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:21,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486743698] [2020-07-17 12:00:21,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:00:21,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486743698] [2020-07-17 12:00:21,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494453447] [2020-07-17 12:00:21,821 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:21,861 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-17 12:00:21,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:21,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 12:00:21,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:00:21,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:21,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-17 12:00:21,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234229781] [2020-07-17 12:00:21,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:00:21,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:21,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:00:21,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:00:21,926 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-17 12:00:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:22,028 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-17 12:00:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:00:22,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-17 12:00:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:22,030 INFO L225 Difference]: With dead ends: 37 [2020-07-17 12:00:22,030 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 12:00:22,031 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 [2020-07-17 12:00:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 12:00:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-17 12:00:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:00:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-17 12:00:22,037 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-17 12:00:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:22,038 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-17 12:00:22,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:00:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-17 12:00:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-17 12:00:22,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:22,040 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:22,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-17 12:00:22,242 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:22,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-17 12:00:22,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:22,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115003635] [2020-07-17 12:00:22,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 12:00:22,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115003635] [2020-07-17 12:00:22,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006614677] [2020-07-17 12:00:22,431 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:22,473 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-17 12:00:22,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:22,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-17 12:00:22,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 12:00:22,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:22,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-17 12:00:22,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621195254] [2020-07-17 12:00:22,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 12:00:22,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 12:00:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:00:22,508 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-17 12:00:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:22,622 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-17 12:00:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:00:22,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-17 12:00:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:22,624 INFO L225 Difference]: With dead ends: 40 [2020-07-17 12:00:22,624 INFO L226 Difference]: Without dead ends: 36 [2020-07-17 12:00:22,625 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 [2020-07-17 12:00:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-17 12:00:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-17 12:00:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-17 12:00:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-17 12:00:22,632 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-17 12:00:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:22,632 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-17 12:00:22,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 12:00:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-17 12:00:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 12:00:22,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:22,634 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:22,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:22,848 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:22,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:22,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-17 12:00:22,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:22,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265556857] [2020-07-17 12:00:22,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 12:00:23,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265556857] [2020-07-17 12:00:23,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996203482] [2020-07-17 12:00:23,082 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-17 12:00:23,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 12:00:23,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:23,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-17 12:00:23,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565810999] [2020-07-17 12:00:23,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 12:00:23,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:23,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 12:00:23,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-17 12:00:23,182 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-17 12:00:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:23,305 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-17 12:00:23,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:00:23,305 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-17 12:00:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:23,307 INFO L225 Difference]: With dead ends: 43 [2020-07-17 12:00:23,307 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 12:00:23,310 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 [2020-07-17 12:00:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 12:00:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-17 12:00:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-17 12:00:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-17 12:00:23,327 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-17 12:00:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:23,327 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-17 12:00:23,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 12:00:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-17 12:00:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-17 12:00:23,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:23,332 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:23,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:23,548 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-17 12:00:23,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:23,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361526004] [2020-07-17 12:00:23,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 12:00:23,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361526004] [2020-07-17 12:00:23,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606048004] [2020-07-17 12:00:23,895 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:23,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:00:23,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:23,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-17 12:00:23,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 12:00:24,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:24,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-17 12:00:24,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576430581] [2020-07-17 12:00:24,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 12:00:24,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 12:00:24,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:00:24,016 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-17 12:00:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:24,219 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-17 12:00:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 12:00:24,220 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-17 12:00:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:24,221 INFO L225 Difference]: With dead ends: 46 [2020-07-17 12:00:24,221 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 12:00:24,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-17 12:00:24,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 12:00:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 12:00:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 12:00:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-17 12:00:24,229 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-17 12:00:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:24,230 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-17 12:00:24,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 12:00:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-17 12:00:24,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 12:00:24,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:24,232 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:24,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-17 12:00:24,445 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-17 12:00:24,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:24,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146138508] [2020-07-17 12:00:24,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 12:00:24,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146138508] [2020-07-17 12:00:24,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482939740] [2020-07-17 12:00:24,741 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:24,797 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-17 12:00:24,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:24,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-17 12:00:24,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 12:00:24,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:24,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-17 12:00:24,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582022067] [2020-07-17 12:00:24,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 12:00:24,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:24,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 12:00:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-17 12:00:24,873 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-17 12:00:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:25,034 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-17 12:00:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 12:00:25,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-17 12:00:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:25,036 INFO L225 Difference]: With dead ends: 49 [2020-07-17 12:00:25,036 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 12:00:25,041 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 [2020-07-17 12:00:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 12:00:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-17 12:00:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 12:00:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-17 12:00:25,051 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-17 12:00:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:25,051 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-17 12:00:25,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 12:00:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-17 12:00:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-17 12:00:25,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:25,058 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:25,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:25,258 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:25,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-17 12:00:25,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:25,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550900027] [2020-07-17 12:00:25,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-17 12:00:25,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550900027] [2020-07-17 12:00:25,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630387023] [2020-07-17 12:00:25,713 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:25,761 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:00:25,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:25,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-17 12:00:25,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-17 12:00:25,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:25,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-17 12:00:25,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46950217] [2020-07-17 12:00:25,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 12:00:25,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 12:00:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:00:25,805 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-17 12:00:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:25,970 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-17 12:00:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 12:00:25,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-17 12:00:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:25,972 INFO L225 Difference]: With dead ends: 52 [2020-07-17 12:00:25,972 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 12:00:25,974 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 [2020-07-17 12:00:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 12:00:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-17 12:00:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 12:00:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-17 12:00:25,980 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-17 12:00:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:25,981 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-17 12:00:25,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 12:00:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-17 12:00:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 12:00:25,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:25,982 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:26,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:26,184 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-17 12:00:26,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:26,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007232060] [2020-07-17 12:00:26,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-17 12:00:26,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007232060] [2020-07-17 12:00:26,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402845517] [2020-07-17 12:00:26,687 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:26,740 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-17 12:00:26,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:26,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-17 12:00:26,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-17 12:00:26,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:26,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-17 12:00:26,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081457583] [2020-07-17 12:00:26,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 12:00:26,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 12:00:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:00:26,806 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-17 12:00:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:26,994 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-17 12:00:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 12:00:26,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-17 12:00:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:26,996 INFO L225 Difference]: With dead ends: 55 [2020-07-17 12:00:26,996 INFO L226 Difference]: Without dead ends: 51 [2020-07-17 12:00:26,998 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 [2020-07-17 12:00:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-17 12:00:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-17 12:00:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 12:00:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-17 12:00:27,012 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-17 12:00:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:27,013 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-17 12:00:27,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 12:00:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-17 12:00:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-17 12:00:27,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:27,016 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:27,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-17 12:00:27,230 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-17 12:00:27,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:27,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581196814] [2020-07-17 12:00:27,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-17 12:00:27,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581196814] [2020-07-17 12:00:27,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098627390] [2020-07-17 12:00:27,816 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:27,878 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-17 12:00:27,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:27,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-17 12:00:27,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-17 12:00:27,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:27,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-17 12:00:27,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472745787] [2020-07-17 12:00:27,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 12:00:27,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:27,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 12:00:27,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-17 12:00:27,920 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-17 12:00:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:28,106 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-17 12:00:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 12:00:28,107 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-17 12:00:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:28,108 INFO L225 Difference]: With dead ends: 58 [2020-07-17 12:00:28,109 INFO L226 Difference]: Without dead ends: 54 [2020-07-17 12:00:28,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-17 12:00:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-17 12:00:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-17 12:00:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 12:00:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-17 12:00:28,116 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-17 12:00:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:28,116 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-17 12:00:28,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 12:00:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-17 12:00:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-17 12:00:28,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:28,118 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:28,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-17 12:00:28,320 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:28,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-17 12:00:28,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:28,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831302897] [2020-07-17 12:00:28,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-17 12:00:28,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831302897] [2020-07-17 12:00:28,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655262501] [2020-07-17 12:00:28,856 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-17 12:00:28,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-17 12:00:28,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:28,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-17 12:00:28,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331100095] [2020-07-17 12:00:28,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 12:00:28,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 12:00:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-17 12:00:28,970 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-17 12:00:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:29,162 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-17 12:00:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 12:00:29,162 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-17 12:00:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:29,163 INFO L225 Difference]: With dead ends: 61 [2020-07-17 12:00:29,163 INFO L226 Difference]: Without dead ends: 57 [2020-07-17 12:00:29,165 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 [2020-07-17 12:00:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-17 12:00:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-17 12:00:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 12:00:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-17 12:00:29,174 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-17 12:00:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:29,175 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-17 12:00:29,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 12:00:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-17 12:00:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-17 12:00:29,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:29,176 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:29,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-17 12:00:29,381 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:29,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:29,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-17 12:00:29,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:29,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451573482] [2020-07-17 12:00:29,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-17 12:00:29,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451573482] [2020-07-17 12:00:29,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523187388] [2020-07-17 12:00:29,943 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:29,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:00:29,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:29,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-17 12:00:29,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-17 12:00:30,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:30,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-17 12:00:30,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494452075] [2020-07-17 12:00:30,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 12:00:30,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:30,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 12:00:30,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:00:30,044 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-17 12:00:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:30,250 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-17 12:00:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 12:00:30,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-17 12:00:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:30,252 INFO L225 Difference]: With dead ends: 64 [2020-07-17 12:00:30,252 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 12:00:30,253 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 [2020-07-17 12:00:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 12:00:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-17 12:00:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 12:00:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-17 12:00:30,266 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-17 12:00:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:30,269 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-17 12:00:30,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 12:00:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-17 12:00:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-17 12:00:30,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:30,270 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:30,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:30,486 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:30,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-17 12:00:30,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:30,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992754683] [2020-07-17 12:00:30,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-07-17 12:00:32,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992754683] [2020-07-17 12:00:32,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562084384] [2020-07-17 12:00:32,124 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:00:32,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-17 12:00:32,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:32,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 137 conjunts are in the unsatisfiable core [2020-07-17 12:00:32,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-07-17 12:00:34,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:34,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2020-07-17 12:00:34,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967817389] [2020-07-17 12:00:34,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-17 12:00:34,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:34,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-17 12:00:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=5032, Unknown=0, NotChecked=0, Total=5402 [2020-07-17 12:00:34,393 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 74 states. [2020-07-17 12:00:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:37,909 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-07-17 12:00:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-17 12:00:37,909 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 103 [2020-07-17 12:00:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:37,910 INFO L225 Difference]: With dead ends: 63 [2020-07-17 12:00:37,910 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:00:37,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=902, Invalid=10440, Unknown=0, NotChecked=0, Total=11342 [2020-07-17 12:00:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:00:37,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:00:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:00:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:00:37,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-07-17 12:00:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:37,916 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:00:37,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-17 12:00:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:00:37,916 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:00:38,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-17 12:00:38,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:00:38,164 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:00:38,164 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:00:38,164 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:00:38,164 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:00:38,165 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:00:38,165 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:00:38,165 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-17 12:00:38,165 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)) [2020-07-17 12:00:38,165 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-17 12:00:38,165 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-17 12:00:38,165 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-17 12:00:38,166 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-17 12:00:38,166 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-17 12:00:38,166 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-17 12:00:38,166 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-17 12:00:38,167 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-17 12:00:38,167 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-17 12:00:38,167 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 15 main_~a~0) [2020-07-17 12:00:38,167 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-17 12:00:38,167 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-17 12:00:38,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:00:38 BoogieIcfgContainer [2020-07-17 12:00:38,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:00:38,176 INFO L168 Benchmark]: Toolchain (without parser) took 20078.73 ms. Allocated memory was 136.3 MB in the beginning and 447.7 MB in the end (delta: 311.4 MB). Free memory was 101.6 MB in the beginning and 244.7 MB in the end (delta: -143.1 MB). Peak memory consumption was 168.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:38,177 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 12:00:38,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.43 ms. Allocated memory is still 136.3 MB. Free memory was 101.2 MB in the beginning and 92.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:38,178 INFO L168 Benchmark]: Boogie Preprocessor took 29.73 ms. Allocated memory is still 136.3 MB. Free memory was 92.0 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:38,179 INFO L168 Benchmark]: RCFGBuilder took 321.42 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 90.6 MB in the beginning and 168.5 MB in the end (delta: -77.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:38,179 INFO L168 Benchmark]: TraceAbstraction took 19416.28 ms. Allocated memory was 199.8 MB in the beginning and 447.7 MB in the end (delta: 248.0 MB). Free memory was 167.8 MB in the beginning and 244.7 MB in the end (delta: -77.0 MB). Peak memory consumption was 171.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:38,182 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.43 ms. Allocated memory is still 136.3 MB. Free memory was 101.2 MB in the beginning and 92.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.73 ms. Allocated memory is still 136.3 MB. Free memory was 92.0 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.42 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 90.6 MB in the beginning and 168.5 MB in the end (delta: -77.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19416.28 ms. Allocated memory was 199.8 MB in the beginning and 447.7 MB in the end (delta: 248.0 MB). Free memory was 167.8 MB in the beginning and 244.7 MB in the end (delta: -77.0 MB). Peak memory consumption was 171.0 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: 19.2s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 511 SDslu, 1615 SDs, 0 SdLazy, 2090 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1559 GetRequests, 1170 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 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: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 1843 NumberOfCodeBlocks, 1843 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1812 ConstructedInterpolants, 0 QuantifiedInterpolants, 414750 SizeOfPredicates, 154 NumberOfNonLiveVariables, 2700 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 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...