/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 BIGGEST_EQUIVALENCE_CLASS --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_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:21:51,652 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 22:21:51,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:21:51,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:21:51,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:21:51,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:21:51,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:21:51,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:21:51,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:21:51,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:21:51,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:21:51,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:21:51,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:21:51,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:21:51,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:21:51,726 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 [2020-07-21 22:21:51,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:21:51,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:21:51,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:21:51,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:21:51,748 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:21:51,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:21:51,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:21:51,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:21:51,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:21:51,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:21:51,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:21:51,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:21:51,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:21:51,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:21:51,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:21:51,750 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:21:51,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:21:51,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:21:51,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:21:51,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:21:51,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:21:51,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:21:51,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:21:51,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:21:51,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:21:51,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:21:51,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:51,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:21:51,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:21:51,753 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:21:52,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:21:52,133 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:21:52,137 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:21:52,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:21:52,140 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:21:52,143 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-07-21 22:21:52,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b76af5a59/84a413330a0c4d07b94b06a42db3c8d9/FLAGd0005bbbb [2020-07-21 22:21:52,869 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:21:52,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-07-21 22:21:52,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b76af5a59/84a413330a0c4d07b94b06a42db3c8d9/FLAGd0005bbbb [2020-07-21 22:21:53,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b76af5a59/84a413330a0c4d07b94b06a42db3c8d9 [2020-07-21 22:21:53,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:21:53,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:21:53,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:21:53,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:21:53,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:21:53,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:21:53" (1/1) ... [2020-07-21 22:21:53,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b3391b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53, skipping insertion in model container [2020-07-21 22:21:53,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:21:53" (1/1) ... [2020-07-21 22:21:53,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:21:53,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:21:53,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:21:53,539 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:21:53,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:21:53,579 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:21:53,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53 WrapperNode [2020-07-21 22:21:53,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:21:53,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:21:53,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:21:53,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:21:53,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53" (1/1) ... [2020-07-21 22:21:53,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53" (1/1) ... [2020-07-21 22:21:53,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53" (1/1) ... [2020-07-21 22:21:53,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53" (1/1) ... [2020-07-21 22:21:53,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53" (1/1) ... [2020-07-21 22:21:53,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53" (1/1) ... [2020-07-21 22:21:53,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53" (1/1) ... [2020-07-21 22:21:53,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:21:53,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:21:53,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:21:53,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:21:53,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:21:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:21:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:21:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 22:21:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:21:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:21:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:21:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 22:21:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:21:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:21:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:21:54,023 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:21:54,024 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:21:54,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:21:54 BoogieIcfgContainer [2020-07-21 22:21:54,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:21:54,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:21:54,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:21:54,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:21:54,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:21:53" (1/3) ... [2020-07-21 22:21:54,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c2fd07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:21:54, skipping insertion in model container [2020-07-21 22:21:54,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:21:53" (2/3) ... [2020-07-21 22:21:54,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c2fd07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:21:54, skipping insertion in model container [2020-07-21 22:21:54,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:21:54" (3/3) ... [2020-07-21 22:21:54,043 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-07-21 22:21:54,056 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:21:54,064 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:21:54,084 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:21:54,116 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:21:54,117 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:21:54,117 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:21:54,117 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:21:54,118 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:21:54,118 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:21:54,118 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:21:54,120 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:21:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 22:21:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:21:54,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:54,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:54,151 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:54,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:54,159 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 22:21:54,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:54,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562809838] [2020-07-21 22:21:54,170 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 [2020-07-21 22:21:54,269 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:54,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:21:54,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:21:54,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:21:54,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562809838] [2020-07-21 22:21:54,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:21:54,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:21:54,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133791250] [2020-07-21 22:21:54,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:21:54,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:21:54,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:21:54,448 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 22:21:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:54,578 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 22:21:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:21:54,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:21:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:54,592 INFO L225 Difference]: With dead ends: 30 [2020-07-21 22:21:54,592 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 22:21:54,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:21:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 22:21:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 22:21:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 22:21:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 22:21:54,659 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 22:21:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:54,660 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 22:21:54,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:21:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 22:21:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:21:54,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:54,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:54,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:54,879 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:54,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:54,880 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 22:21:54,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:54,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521063604] [2020-07-21 22:21:54,883 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 [2020-07-21 22:21:54,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:54,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:54,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:21:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 22:21:54,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:55,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:55,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:21:55,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521063604] [2020-07-21 22:21:55,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:55,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 22:21:55,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549795146] [2020-07-21 22:21:55,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:21:55,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:21:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:21:55,277 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-21 22:21:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:55,389 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 22:21:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:21:55,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-21 22:21:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:55,392 INFO L225 Difference]: With dead ends: 25 [2020-07-21 22:21:55,392 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 22:21:55,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:21:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 22:21:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 22:21:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:21:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 22:21:55,403 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 22:21:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:55,404 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 22:21:55,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:21:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 22:21:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:21:55,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:55,407 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:55,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:55,620 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:55,621 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-21 22:21:55,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:55,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295355994] [2020-07-21 22:21:55,622 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 [2020-07-21 22:21:55,656 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:55,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:21:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 22:21:55,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:55,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:55,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 22:21:56,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295355994] [2020-07-21 22:21:56,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:56,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 22:21:56,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009500071] [2020-07-21 22:21:56,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:21:56,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:56,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:21:56,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:21:56,118 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-21 22:21:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:56,218 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 22:21:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:21:56,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-21 22:21:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:56,222 INFO L225 Difference]: With dead ends: 28 [2020-07-21 22:21:56,222 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 22:21:56,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:21:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 22:21:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 22:21:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 22:21:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 22:21:56,241 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 22:21:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:56,242 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 22:21:56,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:21:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 22:21:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 22:21:56,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:56,244 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:56,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:56,458 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-21 22:21:56,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:56,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645686820] [2020-07-21 22:21:56,460 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 [2020-07-21 22:21:56,529 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:56,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:56,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:21:56,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 22:21:56,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:57,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:57,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:57,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:21:57,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645686820] [2020-07-21 22:21:57,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:57,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 22:21:57,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167705573] [2020-07-21 22:21:57,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:21:57,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:21:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:21:57,343 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-21 22:21:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:57,441 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-21 22:21:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:21:57,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-21 22:21:57,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:57,444 INFO L225 Difference]: With dead ends: 31 [2020-07-21 22:21:57,444 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 22:21:57,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:21:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 22:21:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 22:21:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 22:21:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 22:21:57,452 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-21 22:21:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:57,452 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 22:21:57,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:21:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 22:21:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 22:21:57,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:57,454 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:57,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:57,669 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:57,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-21 22:21:57,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:57,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221794453] [2020-07-21 22:21:57,671 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 [2020-07-21 22:21:57,704 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:57,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:57,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:21:57,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 22:21:57,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:58,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 22:21:58,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221794453] [2020-07-21 22:21:58,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:58,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 22:21:58,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705354528] [2020-07-21 22:21:58,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:21:58,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:21:58,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:21:58,830 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-21 22:21:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:58,958 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-21 22:21:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:21:58,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-21 22:21:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:58,968 INFO L225 Difference]: With dead ends: 34 [2020-07-21 22:21:58,969 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:21:58,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:21:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:21:58,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:21:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:21:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-21 22:21:58,977 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-21 22:21:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:58,978 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-21 22:21:58,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:21:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-21 22:21:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 22:21:58,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:58,980 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:59,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:59,183 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-21 22:21:59,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:59,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453285203] [2020-07-21 22:21:59,186 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 [2020-07-21 22:21:59,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:59,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:59,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:21:59,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 22:21:59,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:00,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 22:22:00,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453285203] [2020-07-21 22:22:00,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:00,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 22:22:00,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753198174] [2020-07-21 22:22:00,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:22:00,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:22:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:22:00,798 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-21 22:22:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:00,938 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-21 22:22:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:22:00,939 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-21 22:22:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:00,940 INFO L225 Difference]: With dead ends: 37 [2020-07-21 22:22:00,941 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 22:22:00,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:22:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 22:22:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 22:22:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 22:22:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-21 22:22:00,950 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-21 22:22:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:00,951 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-21 22:22:00,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:22:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-21 22:22:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 22:22:00,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:00,954 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:01,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:01,168 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:01,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-21 22:22:01,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:01,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964547546] [2020-07-21 22:22:01,170 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:01,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:01,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:22:01,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-21 22:22:01,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:02,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:02,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:02,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 22:22:03,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964547546] [2020-07-21 22:22:03,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:03,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 22:22:03,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858793288] [2020-07-21 22:22:03,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:22:03,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:22:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:22:03,530 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-21 22:22:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:03,744 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-21 22:22:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:22:03,747 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-21 22:22:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:03,748 INFO L225 Difference]: With dead ends: 40 [2020-07-21 22:22:03,749 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 22:22:03,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:22:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 22:22:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 22:22:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 22:22:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 22:22:03,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-21 22:22:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:03,764 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 22:22:03,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:22:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 22:22:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 22:22:03,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:03,767 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:03,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:03,976 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:03,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-21 22:22:03,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:03,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385004008] [2020-07-21 22:22:03,978 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:04,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:22:04,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:04,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:22:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 22:22:04,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:05,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:05,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:06,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:06,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:06,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:06,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 22:22:07,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385004008] [2020-07-21 22:22:07,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:07,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 22:22:07,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631096053] [2020-07-21 22:22:07,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:22:07,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:07,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:22:07,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:22:07,374 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-21 22:22:07,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:07,589 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-21 22:22:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:07,590 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-21 22:22:07,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:07,592 INFO L225 Difference]: With dead ends: 43 [2020-07-21 22:22:07,592 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 22:22:07,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:22:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 22:22:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 22:22:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 22:22:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 22:22:07,602 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-21 22:22:07,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:07,603 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 22:22:07,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:22:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 22:22:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 22:22:07,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:07,606 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:07,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:07,810 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:07,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-21 22:22:07,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:07,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346571447] [2020-07-21 22:22:07,813 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:07,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:07,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:07,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:22:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-21 22:22:08,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:10,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:11,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:11,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:11,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 22:22:12,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346571447] [2020-07-21 22:22:12,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:12,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 22:22:12,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656414006] [2020-07-21 22:22:12,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:22:12,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:12,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:22:12,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:22:12,578 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-21 22:22:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:12,850 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-21 22:22:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:22:12,851 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-21 22:22:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:12,853 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:22:12,853 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:22:12,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:22:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:22:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 22:22:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 22:22:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-21 22:22:12,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-21 22:22:12,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:12,863 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-21 22:22:12,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:22:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-21 22:22:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 22:22:12,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:12,865 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:13,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:13,071 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:13,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-21 22:22:13,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:13,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528426196] [2020-07-21 22:22:13,074 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:13,215 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:22:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:13,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:22:13,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-21 22:22:13,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:16,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:16,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:17,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:17,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:18,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:18,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:18,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:18,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-21 22:22:19,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528426196] [2020-07-21 22:22:19,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:19,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 22:22:19,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805423958] [2020-07-21 22:22:19,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:22:19,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:19,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:22:19,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:22:19,905 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-21 22:22:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:20,159 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-21 22:22:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:22:20,161 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-21 22:22:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:20,162 INFO L225 Difference]: With dead ends: 49 [2020-07-21 22:22:20,162 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 22:22:20,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:22:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 22:22:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-21 22:22:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:22:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-21 22:22:20,171 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-21 22:22:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:20,172 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-21 22:22:20,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:22:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-21 22:22:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 22:22:20,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:20,174 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:20,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:20,386 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:20,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-21 22:22:20,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:20,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907018915] [2020-07-21 22:22:20,388 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:20,610 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:22:20,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:22:20,610 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:22:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:22:20,631 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:22:20,666 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:22:20,667 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:22:20,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:20,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:22:20 BoogieIcfgContainer [2020-07-21 22:22:20,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:22:20,921 INFO L168 Benchmark]: Toolchain (without parser) took 27692.84 ms. Allocated memory was 144.7 MB in the beginning and 407.9 MB in the end (delta: 263.2 MB). Free memory was 102.8 MB in the beginning and 361.3 MB in the end (delta: -258.5 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:22:20,922 INFO L168 Benchmark]: CDTParser took 0.86 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 22:22:20,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.36 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:22:20,924 INFO L168 Benchmark]: Boogie Preprocessor took 42.04 ms. Allocated memory is still 144.7 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:22:20,925 INFO L168 Benchmark]: RCFGBuilder took 406.15 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.8 MB in the beginning and 170.5 MB in the end (delta: -78.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:22:20,926 INFO L168 Benchmark]: TraceAbstraction took 26887.04 ms. Allocated memory was 201.9 MB in the beginning and 407.9 MB in the end (delta: 206.0 MB). Free memory was 169.8 MB in the beginning and 361.3 MB in the end (delta: -191.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-21 22:22:20,930 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 349.36 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.04 ms. Allocated memory is still 144.7 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 406.15 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.8 MB in the beginning and 170.5 MB in the end (delta: -78.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26887.04 ms. Allocated memory was 201.9 MB in the beginning and 407.9 MB in the end (delta: 206.0 MB). Free memory was 169.8 MB in the beginning and 361.3 MB in the end (delta: -191.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; VAL [input=10] [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=10, input=10] [L11] int result = id(input); [L12] COND TRUE result == 10 VAL [input=10, result=10] [L13] __VERIFIER_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26.7s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 510 SDslu, 768 SDs, 0 SdLazy, 392 SolverSat, 197 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 832 GetRequests, 531 SyntacticMatches, 109 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 21.3s InterpolantComputationTime, 473 NumberOfCodeBlocks, 338 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 768 ConstructedInterpolants, 0 QuantifiedInterpolants, 106872 SizeOfPredicates, 65 NumberOfNonLiveVariables, 645 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 615/1800 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 incorrect! Received shutdown request...