/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_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:52:49,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:52:49,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:52:49,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 00:52:49,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:52:49,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:52:49,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:52:49,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:52:49,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:52:49,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:52:49,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:52:49,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:52:49,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:52:49,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:52:49,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:52:49,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:52:49,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:52:49,722 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 00:52:49,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:52:49,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:52:49,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:52:49,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:52:49,752 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:52:49,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:52:49,752 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:52:49,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:52:49,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:52:49,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:52:49,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:52:49,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:52:49,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:52:49,755 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:52:49,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:52:49,755 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:52:49,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:52:49,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:52:49,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:52:49,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:52:49,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:52:49,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:52:49,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:52:49,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:52:49,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:52:49,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:52:49,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:49,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:52:49,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:52:49,758 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 00:52:50,096 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:52:50,111 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:52:50,115 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:52:50,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:52:50,117 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:52:50,118 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2020-07-21 00:52:50,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657d04014/a562f039b7bd46cdaaf7d7848fb4316a/FLAG8493d6481 [2020-07-21 00:52:50,762 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:52:50,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2020-07-21 00:52:50,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657d04014/a562f039b7bd46cdaaf7d7848fb4316a/FLAG8493d6481 [2020-07-21 00:52:51,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657d04014/a562f039b7bd46cdaaf7d7848fb4316a [2020-07-21 00:52:51,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:52:51,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:52:51,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:52:51,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:52:51,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:52:51,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:52:51" (1/1) ... [2020-07-21 00:52:51,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd8439d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51, skipping insertion in model container [2020-07-21 00:52:51,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:52:51" (1/1) ... [2020-07-21 00:52:51,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:52:51,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:52:51,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:52:51,380 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:52:51,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:52:51,407 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:52:51,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51 WrapperNode [2020-07-21 00:52:51,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:52:51,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:52:51,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:52:51,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:52:51,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51" (1/1) ... [2020-07-21 00:52:51,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51" (1/1) ... [2020-07-21 00:52:51,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51" (1/1) ... [2020-07-21 00:52:51,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51" (1/1) ... [2020-07-21 00:52:51,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51" (1/1) ... [2020-07-21 00:52:51,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51" (1/1) ... [2020-07-21 00:52:51,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51" (1/1) ... [2020-07-21 00:52:51,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:52:51,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:52:51,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:52:51,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:52:51,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51" (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 00:52:51,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:52:51,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:52:51,596 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 00:52:51,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:52:51,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:52:51,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:52:51,598 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 00:52:51,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:52:51,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:52:51,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:52:51,763 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:52:51,763 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:52:51,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:52:51 BoogieIcfgContainer [2020-07-21 00:52:51,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:52:51,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:52:51,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:52:51,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:52:51,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:52:51" (1/3) ... [2020-07-21 00:52:51,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e2ffd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:52:51, skipping insertion in model container [2020-07-21 00:52:51,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:52:51" (2/3) ... [2020-07-21 00:52:51,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e2ffd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:52:51, skipping insertion in model container [2020-07-21 00:52:51,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:52:51" (3/3) ... [2020-07-21 00:52:51,776 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2020-07-21 00:52:51,784 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:52:51,791 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:52:51,806 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:52:51,831 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:52:51,832 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:52:51,832 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:52:51,832 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:52:51,832 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:52:51,833 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:52:51,833 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:52:51,833 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:52:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 00:52:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:52:51,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:51,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:51,857 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:51,862 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 00:52:51,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:51,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021704557] [2020-07-21 00:52:51,870 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 00:52:51,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:52:51,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:52:51,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:52,036 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 00:52:52,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:52:52,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021704557] [2020-07-21 00:52:52,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:52:52,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:52:52,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168404036] [2020-07-21 00:52:52,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:52:52,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:52,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:52:52,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:52:52,068 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 00:52:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:52,163 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 00:52:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:52:52,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:52:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:52,177 INFO L225 Difference]: With dead ends: 30 [2020-07-21 00:52:52,178 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 00:52:52,182 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 00:52:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 00:52:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 00:52:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 00:52:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 00:52:52,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 00:52:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:52,238 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 00:52:52,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:52:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 00:52:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 00:52:52,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:52,241 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 00:52:52,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:52,457 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 00:52:52,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:52,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143348633] [2020-07-21 00:52:52,460 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 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 00:52:52,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:52:52,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:52,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:52:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:52,586 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 00:52:52,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:52,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,892 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 00:52:52,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143348633] [2020-07-21 00:52:52,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:52,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 00:52:52,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195200384] [2020-07-21 00:52:52,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:52:52,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:52,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:52:52,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:52:52,900 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-21 00:52:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:53,009 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 00:52:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:52:53,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-21 00:52:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:53,013 INFO L225 Difference]: With dead ends: 25 [2020-07-21 00:52:53,013 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 00:52:53,016 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 00:52:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 00:52:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 00:52:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 00:52:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 00:52:53,032 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 00:52:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:53,034 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 00:52:53,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:52:53,035 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 00:52:53,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 00:52:53,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:53,038 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 00:52:53,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:53,254 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-21 00:52:53,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:53,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421036029] [2020-07-21 00:52:53,257 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 00:52:53,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:52:53,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:52:53,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:53,362 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 00:52:53,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:53,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:53,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:53,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:53,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:53,780 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 00:52:53,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421036029] [2020-07-21 00:52:53,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:53,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 00:52:53,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600299508] [2020-07-21 00:52:53,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:52:53,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:52:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:52:53,787 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-21 00:52:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:53,878 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 00:52:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:52:53,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-21 00:52:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:53,881 INFO L225 Difference]: With dead ends: 28 [2020-07-21 00:52:53,881 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 00:52:53,882 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 00:52:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 00:52:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 00:52:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 00:52:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 00:52:53,894 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 00:52:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:53,894 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 00:52:53,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:52:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 00:52:53,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 00:52:53,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:53,896 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 00:52:54,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:54,112 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-21 00:52:54,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:54,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957090408] [2020-07-21 00:52:54,114 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 00:52:54,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:52:54,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:52:54,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:54,207 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 00:52:54,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:54,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:54,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:54,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:54,805 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 00:52:54,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957090408] [2020-07-21 00:52:54,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:54,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 00:52:54,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781830214] [2020-07-21 00:52:54,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:52:54,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:54,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:52:54,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:52:54,808 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-21 00:52:54,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:54,888 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-21 00:52:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:52:54,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-21 00:52:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:54,891 INFO L225 Difference]: With dead ends: 31 [2020-07-21 00:52:54,891 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 00:52:54,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:52:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 00:52:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 00:52:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 00:52:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 00:52:54,898 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-21 00:52:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:54,898 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 00:52:54,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:52:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 00:52:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 00:52:54,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:54,900 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 00:52:55,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:55,104 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:55,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:55,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-21 00:52:55,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:55,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336551999] [2020-07-21 00:52:55,105 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 00:52:55,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:52:55,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:55,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:52:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:55,208 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 00:52:55,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:55,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:55,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:55,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:55,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:55,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:55,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:56,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:56,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:56,069 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 00:52:56,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336551999] [2020-07-21 00:52:56,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:56,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 00:52:56,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401432819] [2020-07-21 00:52:56,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:52:56,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:52:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:52:56,072 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-21 00:52:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:56,191 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-21 00:52:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:52:56,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-21 00:52:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:56,197 INFO L225 Difference]: With dead ends: 34 [2020-07-21 00:52:56,197 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:52:56,198 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 00:52:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:52:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 00:52:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:52:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-21 00:52:56,204 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-21 00:52:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:56,205 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-21 00:52:56,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:52:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-21 00:52:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 00:52:56,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:56,207 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 00:52:56,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:56,420 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-21 00:52:56,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:56,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173535378] [2020-07-21 00:52:56,422 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 00:52:56,464 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:52:56,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:56,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:52:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:56,545 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 00:52:56,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:57,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:57,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:57,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:57,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:57,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:57,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:57,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:57,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:57,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:57,861 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 00:52:57,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173535378] [2020-07-21 00:52:57,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:57,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 00:52:57,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875772678] [2020-07-21 00:52:57,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:52:57,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:57,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:52:57,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:52:57,865 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-21 00:52:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:58,004 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-21 00:52:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:52:58,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-21 00:52:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:58,006 INFO L225 Difference]: With dead ends: 37 [2020-07-21 00:52:58,007 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 00:52:58,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:52:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 00:52:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 00:52:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 00:52:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-21 00:52:58,015 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-21 00:52:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:58,015 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-21 00:52:58,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:52:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-21 00:52:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 00:52:58,017 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:58,017 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 00:52:58,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:58,231 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:58,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-21 00:52:58,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:58,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292404814] [2020-07-21 00:52:58,232 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 00:52:58,285 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:52:58,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:52:58,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:58,370 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 00:52:58,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:59,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:59,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:59,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:59,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:59,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:00,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:00,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:00,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:00,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:00,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:00,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:00,317 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 00:53:00,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292404814] [2020-07-21 00:53:00,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:00,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 00:53:00,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793921399] [2020-07-21 00:53:00,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:53:00,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:53:00,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:53:00,320 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-21 00:53:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:00,484 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-21 00:53:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:53:00,485 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-21 00:53:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:00,487 INFO L225 Difference]: With dead ends: 40 [2020-07-21 00:53:00,487 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 00:53:00,488 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 00:53:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 00:53:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 00:53:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:53:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 00:53:00,494 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-21 00:53:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:00,494 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 00:53:00,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:53:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 00:53:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 00:53:00,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:00,496 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 00:53:00,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:00,706 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:00,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-21 00:53:00,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:00,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991929947] [2020-07-21 00:53:00,709 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 00:53:00,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:53:00,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:00,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:53:00,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:00,877 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 00:53:00,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:02,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:02,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:02,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:02,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,669 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 00:53:03,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991929947] [2020-07-21 00:53:03,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:03,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 00:53:03,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897651015] [2020-07-21 00:53:03,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:53:03,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:53:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:53:03,673 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-21 00:53:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:03,857 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-21 00:53:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:53:03,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-21 00:53:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:03,860 INFO L225 Difference]: With dead ends: 43 [2020-07-21 00:53:03,860 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 00:53:03,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:53:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 00:53:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 00:53:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 00:53:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 00:53:03,867 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-21 00:53:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:03,868 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 00:53:03,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:53:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 00:53:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 00:53:03,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:03,869 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 00:53:04,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:04,083 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-21 00:53:04,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:04,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778048070] [2020-07-21 00:53:04,086 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 00:53:04,192 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:53:04,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:04,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:53:04,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:04,320 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 00:53:04,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:06,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:06,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:07,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:07,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:07,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:08,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:08,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:08,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:08,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:08,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:08,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:08,308 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 00:53:08,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778048070] [2020-07-21 00:53:08,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:08,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 00:53:08,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985902064] [2020-07-21 00:53:08,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:53:08,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:08,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:53:08,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:53:08,314 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-21 00:53:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:08,500 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-21 00:53:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:53:08,501 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-21 00:53:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:08,504 INFO L225 Difference]: With dead ends: 46 [2020-07-21 00:53:08,504 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 00:53:08,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:53:08,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 00:53:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 00:53:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 00:53:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-21 00:53:08,515 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-21 00:53:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:08,515 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-21 00:53:08,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:53:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-21 00:53:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 00:53:08,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:08,517 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 00:53:08,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:08,725 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-21 00:53:08,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:08,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782832873] [2020-07-21 00:53:08,727 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 00:53:08,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:53:08,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:08,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:53:08,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:08,994 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 00:53:08,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:11,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:11,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:12,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:12,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:13,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:13,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:13,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:13,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:14,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:14,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:14,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:14,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:14,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:14,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:14,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:14,722 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 00:53:14,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782832873] [2020-07-21 00:53:14,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:14,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 00:53:14,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971437677] [2020-07-21 00:53:14,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:53:14,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:53:14,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:53:14,725 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-21 00:53:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:14,949 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-21 00:53:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:53:14,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-21 00:53:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:14,957 INFO L225 Difference]: With dead ends: 49 [2020-07-21 00:53:14,957 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 00:53:14,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 00:53:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 00:53:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-21 00:53:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:53:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-21 00:53:14,966 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-21 00:53:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:14,966 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-21 00:53:14,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:53:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-21 00:53:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 00:53:14,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:14,968 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 00:53:15,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:15,172 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:15,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-21 00:53:15,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:15,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383357604] [2020-07-21 00:53:15,174 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 00:53:15,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:53:15,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:15,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 00:53:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-21 00:53:15,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-21 00:53:16,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383357604] [2020-07-21 00:53:16,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:16,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-07-21 00:53:16,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381173886] [2020-07-21 00:53:16,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:53:16,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:16,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:53:16,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:53:16,892 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-07-21 00:53:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:17,191 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-21 00:53:17,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 00:53:17,193 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-07-21 00:53:17,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:17,195 INFO L225 Difference]: With dead ends: 52 [2020-07-21 00:53:17,195 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 00:53:17,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:53:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 00:53:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-21 00:53:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 00:53:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-21 00:53:17,211 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-21 00:53:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:17,212 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-21 00:53:17,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:53:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-21 00:53:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 00:53:17,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:17,215 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:17,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:17,430 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:17,430 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-21 00:53:17,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:17,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891458022] [2020-07-21 00:53:17,432 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:17,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:53:17,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:17,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 00:53:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 22 proven. 186 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-07-21 00:53:17,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 22 proven. 286 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 00:53:19,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891458022] [2020-07-21 00:53:19,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:19,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 26 [2020-07-21 00:53:19,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873788472] [2020-07-21 00:53:19,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 00:53:19,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:19,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 00:53:19,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:53:19,797 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2020-07-21 00:53:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:21,035 INFO L93 Difference]: Finished difference Result 106 states and 215 transitions. [2020-07-21 00:53:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 00:53:21,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-07-21 00:53:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:21,037 INFO L225 Difference]: With dead ends: 106 [2020-07-21 00:53:21,037 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:53:21,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=893, Invalid=2187, Unknown=0, NotChecked=0, Total=3080 [2020-07-21 00:53:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:53:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:53:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:53:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:53:21,042 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-07-21 00:53:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:21,042 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:53:21,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 00:53:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:53:21,043 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:53:21,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:21,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:53:21,553 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:53:21,553 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:53:21,554 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:53:21,554 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:53:21,554 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:53:21,554 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:53:21,555 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-21 00:53:21,555 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-21 00:53:21,555 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-21 00:53:21,555 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-21 00:53:21,555 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-21 00:53:21,555 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (= 10 main_~input~0) [2020-07-21 00:53:21,555 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-21 00:53:21,556 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-21 00:53:21,556 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-21 00:53:21,556 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-21 00:53:21,556 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-21 00:53:21,556 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (and (not (= 0 |id_#in~x|)) (= |id_#in~x| id_~x)) [2020-07-21 00:53:21,556 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 00:53:21,557 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-21 00:53:21,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:53:21 BoogieIcfgContainer [2020-07-21 00:53:21,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:53:21,567 INFO L168 Benchmark]: Toolchain (without parser) took 30425.18 ms. Allocated memory was 138.4 MB in the beginning and 415.8 MB in the end (delta: 277.3 MB). Free memory was 102.0 MB in the beginning and 87.9 MB in the end (delta: 14.1 MB). Peak memory consumption was 291.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:53:21,568 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory is still 119.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 00:53:21,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.11 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 00:53:21,569 INFO L168 Benchmark]: Boogie Preprocessor took 24.20 ms. Allocated memory is still 138.4 MB. Free memory was 92.3 MB in the beginning and 91.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 00:53:21,570 INFO L168 Benchmark]: RCFGBuilder took 332.92 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 169.3 MB in the end (delta: -78.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 00:53:21,571 INFO L168 Benchmark]: TraceAbstraction took 29796.02 ms. Allocated memory was 200.8 MB in the beginning and 415.8 MB in the end (delta: 215.0 MB). Free memory was 169.3 MB in the beginning and 87.9 MB in the end (delta: 81.4 MB). Peak memory consumption was 296.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:53:21,574 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory is still 119.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.11 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.20 ms. Allocated memory is still 138.4 MB. Free memory was 92.3 MB in the beginning and 91.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 332.92 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 169.3 MB in the end (delta: -78.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29796.02 ms. Allocated memory was 200.8 MB in the beginning and 415.8 MB in the end (delta: 215.0 MB). Free memory was 169.3 MB in the beginning and 87.9 MB in the end (delta: 81.4 MB). Peak memory consumption was 296.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.4s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 643 SDslu, 1584 SDs, 0 SdLazy, 1013 SolverSat, 356 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1184 GetRequests, 806 SyntacticMatches, 109 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, 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, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 27 PreInvPairs, 27 NumberOfFragments, 16 HoareAnnotationTreeSize, 27 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 472 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 22.5s InterpolantComputationTime, 552 NumberOfCodeBlocks, 378 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1068 ConstructedInterpolants, 0 QuantifiedInterpolants, 170166 SizeOfPredicates, 76 NumberOfNonLiveVariables, 911 ConjunctsInSsa, 224 ConjunctsInUnsatCore, 23 InterpolantComputations, 1 PerfectInterpolantSequences, 1201/3168 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...