/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o1000.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:38:19,326 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:38:19,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:38:19,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:38:19,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:38:19,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:38:19,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:38:19,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:38:19,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:38:19,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:38:19,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:38:19,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:38:19,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:38:19,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:38:19,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:38:19,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:38:19,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:38:19,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:38:19,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:38:19,491 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:38:19,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:38:19,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:38:19,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:38:19,497 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:38:19,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:38:19,497 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:38:19,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:38:19,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:38:19,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:38:19,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:38:19,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:38:19,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:38:19,501 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:38:19,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:38:19,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:38:19,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:38:19,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:38:19,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:38:19,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:38:19,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:38:19,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:38:19,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:38:19,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:38:19,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:38:19,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:38:19,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:19,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:38:19,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:38:19,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:38:19,871 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:38:19,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:38:19,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:38:19,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:38:19,897 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:38:19,899 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-07-20 21:38:19,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce727577/931fd7ec2b3c4c42adda2a6db28ee250/FLAGacb8fed83 [2020-07-20 21:38:20,443 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:38:20,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-07-20 21:38:20,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce727577/931fd7ec2b3c4c42adda2a6db28ee250/FLAGacb8fed83 [2020-07-20 21:38:20,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce727577/931fd7ec2b3c4c42adda2a6db28ee250 [2020-07-20 21:38:20,823 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:38:20,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:38:20,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:38:20,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:38:20,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:38:20,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:38:20" (1/1) ... [2020-07-20 21:38:20,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@755de7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:20, skipping insertion in model container [2020-07-20 21:38:20,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:38:20" (1/1) ... [2020-07-20 21:38:20,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:38:20,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:38:21,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:38:21,133 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:38:21,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:38:21,172 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:38:21,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21 WrapperNode [2020-07-20 21:38:21,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:38:21,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:38:21,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:38:21,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:38:21,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21" (1/1) ... [2020-07-20 21:38:21,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21" (1/1) ... [2020-07-20 21:38:21,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21" (1/1) ... [2020-07-20 21:38:21,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21" (1/1) ... [2020-07-20 21:38:21,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21" (1/1) ... [2020-07-20 21:38:21,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21" (1/1) ... [2020-07-20 21:38:21,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21" (1/1) ... [2020-07-20 21:38:21,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:38:21,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:38:21,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:38:21,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:38:21,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:38:21,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:38:21,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:38:21,471 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 21:38:21,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:38:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 21:38:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:38:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 21:38:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:38:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:38:21,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:38:21,666 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:38:21,666 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:38:21,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:38:21 BoogieIcfgContainer [2020-07-20 21:38:21,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:38:21,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:38:21,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:38:21,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:38:21,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:38:20" (1/3) ... [2020-07-20 21:38:21,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578ca516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:38:21, skipping insertion in model container [2020-07-20 21:38:21,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:38:21" (2/3) ... [2020-07-20 21:38:21,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578ca516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:38:21, skipping insertion in model container [2020-07-20 21:38:21,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:38:21" (3/3) ... [2020-07-20 21:38:21,681 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2020-07-20 21:38:21,694 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:38:21,702 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:38:21,718 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:38:21,748 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:38:21,749 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:38:21,749 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:38:21,749 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:38:21,750 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:38:21,750 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:38:21,750 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:38:21,750 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:38:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 21:38:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:38:21,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:21,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:21,785 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:21,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 21:38:21,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:21,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823115620] [2020-07-20 21:38:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:21,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:38:21,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:21,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:38:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:38:22,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:38:22,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823115620] [2020-07-20 21:38:22,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:38:22,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:38:22,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522607712] [2020-07-20 21:38:22,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:38:22,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:22,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:38:22,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:38:22,161 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 21:38:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:22,232 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-20 21:38:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:38:22,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:38:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:22,249 INFO L225 Difference]: With dead ends: 32 [2020-07-20 21:38:22,249 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 21:38:22,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:38:22,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 21:38:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 21:38:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 21:38:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 21:38:22,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 21:38:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:22,313 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 21:38:22,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:38:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 21:38:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:38:22,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:22,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:22,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:22,519 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:22,520 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 21:38:22,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:22,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84964098] [2020-07-20 21:38:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:22,569 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:22,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:22,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 21:38:22,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 21:38:22,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 21:38:22,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84964098] [2020-07-20 21:38:22,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:22,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 21:38:22,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704087863] [2020-07-20 21:38:22,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:38:22,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:38:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:38:22,868 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-07-20 21:38:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:25,042 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-20 21:38:25,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:38:25,043 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-20 21:38:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:25,044 INFO L225 Difference]: With dead ends: 30 [2020-07-20 21:38:25,044 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 21:38:25,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:38:25,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 21:38:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 21:38:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 21:38:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 21:38:25,063 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-07-20 21:38:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:25,064 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 21:38:25,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:38:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 21:38:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 21:38:25,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:25,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:25,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:25,285 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:25,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times [2020-07-20 21:38:25,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:25,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808209239] [2020-07-20 21:38:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:25,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:25,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:38:25,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 21:38:25,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 21:38:26,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808209239] [2020-07-20 21:38:26,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:26,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-20 21:38:26,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435751146] [2020-07-20 21:38:26,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:38:26,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:26,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:38:26,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:38:26,134 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states. [2020-07-20 21:38:28,428 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2020-07-20 21:38:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:28,715 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-20 21:38:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 21:38:28,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-20 21:38:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:28,720 INFO L225 Difference]: With dead ends: 42 [2020-07-20 21:38:28,720 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 21:38:28,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:38:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 21:38:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 21:38:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:38:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 21:38:28,732 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-07-20 21:38:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:28,733 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 21:38:28,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:38:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 21:38:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 21:38:28,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:28,736 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:28,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:28,952 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times [2020-07-20 21:38:28,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:28,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183419655] [2020-07-20 21:38:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:29,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:29,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:29,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 21:38:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 21:38:29,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 21:38:31,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183419655] [2020-07-20 21:38:31,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:31,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-20 21:38:31,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753116285] [2020-07-20 21:38:31,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 21:38:31,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 21:38:31,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 21:38:31,067 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states. [2020-07-20 21:38:33,777 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-20 21:38:34,336 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-20 21:38:38,903 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-20 21:38:39,708 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-20 21:38:40,154 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-07-20 21:38:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:54,090 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-20 21:38:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 21:38:54,094 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2020-07-20 21:38:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:54,099 INFO L225 Difference]: With dead ends: 66 [2020-07-20 21:38:54,100 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 21:38:54,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=377, Invalid=1874, Unknown=5, NotChecked=0, Total=2256 [2020-07-20 21:38:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 21:38:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 21:38:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:38:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 21:38:54,117 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-07-20 21:38:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:54,117 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 21:38:54,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 21:38:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 21:38:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 21:38:54,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:54,123 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:54,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:54,325 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 4 times [2020-07-20 21:38:54,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:54,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530255419] [2020-07-20 21:38:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:54,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:38:54,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:54,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 68 conjunts are in the unsatisfiable core [2020-07-20 21:38:54,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 21:38:55,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 21:39:01,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530255419] [2020-07-20 21:39:01,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:01,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-20 21:39:01,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618761380] [2020-07-20 21:39:01,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-20 21:39:01,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:01,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-20 21:39:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3940, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 21:39:01,993 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 68 states. [2020-07-20 21:39:25,350 WARN L193 SmtUtils]: Spent 18.58 s on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 21:39:47,709 WARN L193 SmtUtils]: Spent 16.66 s on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:39:59,875 WARN L193 SmtUtils]: Spent 8.78 s on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 21:40:19,293 WARN L193 SmtUtils]: Spent 16.38 s on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:40:30,290 WARN L193 SmtUtils]: Spent 8.30 s on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 21:40:47,431 WARN L193 SmtUtils]: Spent 12.84 s on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 21:40:57,455 WARN L193 SmtUtils]: Spent 7.67 s on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:41:03,034 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:41:12,998 WARN L193 SmtUtils]: Spent 7.92 s on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:41:18,493 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 21:41:21,831 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 21:41:27,287 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:41:29,425 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:41:33,180 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 21:41:34,619 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:41:36,088 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:41:37,235 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:41:38,300 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:41:39,176 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:41:39,963 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:41:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:42,829 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-07-20 21:41:42,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-20 21:41:42,831 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 103 [2020-07-20 21:41:42,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:42,834 INFO L225 Difference]: With dead ends: 114 [2020-07-20 21:41:42,834 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 21:41:42,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 162.4s TimeCoverageRelationStatistics Valid=1526, Invalid=7594, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 21:41:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 21:41:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-20 21:41:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 21:41:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-20 21:41:42,857 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-07-20 21:41:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:42,858 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-20 21:41:42,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-20 21:41:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-20 21:41:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 21:41:42,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:42,863 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:43,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:43,064 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash -935230737, now seen corresponding path program 5 times [2020-07-20 21:41:43,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:43,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17027588] [2020-07-20 21:41:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:55,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:41:55,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-20 21:41:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-20 21:41:58,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1418 refuted. 39 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-20 21:43:53,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17027588] [2020-07-20 21:43:53,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:53,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-20 21:43:53,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631981556] [2020-07-20 21:43:53,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-20 21:43:53,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:54,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-20 21:43:54,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=15003, Unknown=41, NotChecked=0, Total=17292 [2020-07-20 21:43:54,004 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 132 states. [2020-07-20 21:44:56,337 WARN L193 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 158 DAG size of output: 13 [2020-07-20 21:45:50,923 WARN L193 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 156 DAG size of output: 11 [2020-07-20 21:46:54,921 WARN L193 SmtUtils]: Spent 7.02 s on a formula simplification. DAG size of input: 153 DAG size of output: 13 [2020-07-20 21:47:57,175 WARN L193 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 151 DAG size of output: 11 [2020-07-20 21:48:52,523 WARN L193 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-20 21:49:54,373 WARN L193 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2020-07-20 21:50:56,664 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 143 DAG size of output: 13 [2020-07-20 21:51:56,156 WARN L193 SmtUtils]: Spent 5.36 s on a formula simplification. DAG size of input: 141 DAG size of output: 11 [2020-07-20 21:52:49,257 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 138 DAG size of output: 13